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Six-Membered Hetarenes with One Chalcogen
Hydrolysis of Benzotelluropyrylium Salts
other
Author(s):
P. J. Murphy
Publication date
(Online):
2003
Publisher:
Georg Thieme Verlag KG
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Book Chapter
Publication date (Print):
2003
Publication date (Online):
2003
Page
: 1
DOI:
10.1055/sos-SD-014-01203
SO-VID:
c1f639cb-b245-43c7-9e2a-0002a3c1920b
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Book chapters
pp. 1
Ring Closure of 2-Formyl-1-(2-oxoalkyl)arenes
pp. 1
By Formation of One S—C and One C—C Bond
pp. 1
Of Metals
pp. 1
Acid-Catalyzed Coupling of Phenols with Alkynoic Acids
pp. 1
By Oxidation of Thiopyran-3-ones
pp. 1
Oxidation of 1,2,3,4-Tetrahydro-9-xanthen-9-ones Using Quinones
pp. 1
Of Lithium
pp. 1
From 1-Benzothiopyran-2(2)- or 1-Benzothiopyran-4(4)-ones
pp. 1
Substitution of Heteroatoms
pp. 1
Acid-Catalyzed Lactonization of 3-(2-Alkoxyphenyl)acrylates
pp. 1
Synthesis by Ring-Closure Reactions
pp. 1
By C-Formylation and C-Acylation of Dibenzyl Ketones
pp. 1
Base-Catalyzed Isomerization of 3,3′-Bibenzo[]furanylidene-2,2′-diones
pp. 1
Cyclization Using Palladium and Zinc Catalysis
pp. 1
Reaction of Aldehydes with Ylides and Phosphonates of 3,4-Dihydro-2-1-benzopyran-2-ones
pp. 1
Synthesis of 4-1-Benzothiopyran-4-thiones by Reaction of 4-1-Benzothiopyran-4-ones with Phosphorus Pentasulfide
pp. 1
Cyclization of 1-(2-Hydroxyphenyl)prop-2-en-1-ones with Bromine
pp. 1
With 2,3-Dichloro-5,6-dicyanobenzo-1,4-quinone
pp. 1
By Formation of One C—C Bond
pp. 1
Rearrangement of 1,3-Diaryl-1,3-dihydroxy-1,3-dihydro-2-inden-2-ones
pp. 1
By Formation of One O—C Bond
pp. 1
Reaction of 1-Methyl-3-phenyl-2-benzopyrylium Salt with 1-2-Benzothiopyran-1-thione
pp. 1
Palladium-Catalyzed Intramolecular Cyclization of Phenyl Propynoates
pp. 1
Reaction of a Phenol with a 3-Oxocarboxylic Ester
pp. 1
From Pyranones or Pyranthiones and Electrophiles
pp. 1
With an α-Methylene Carbonitrile
pp. 1
Intramolecular Friedel–Crafts Reaction of 3-Phenoxyacrylic Acid Derivatives
pp. 1
4-Selenopyran-4-ones by Oxidation of 4-Selenopyrans
pp. 1
By Oxidation
pp. 1
Acid-Catalyzed Cyclization of 2-Oxopropyl Benzoates
pp. 1
From Methyl(ene) Ketones and α,β-Unsaturated Ketones Followed by Dehydrocyclization
pp. 1
With Formation of the 10a—10b Bond
pp. 1
Condensation of Aryl Methyl Ketones with Carboxylic Acid Derivatives
pp. 1
Dimerization of 3-Oxidopyrylium and 3-Oxidothiopyrylium Salts by [3 + 3] Cycloaddition
pp. 1
Sequential Thio-Claisen Reactions
pp. 1
Reduction
pp. 1
Preparation of Benzo- and Dibenzoselenopyranthiones
pp. 1
From Diarylsulfanes and an Acid Chloride
pp. 1
From Aroylacetonitriles
pp. 1
By Electrophilic Cyclization of Methyl Selenides
pp. 1
Condensation of 2-Hydroxyphenyl (Methylsulfinyl)methyl Ketones with Aldehydes
pp. 1
Condensation of Phenols and Naphthols with 2-Hydroxybenzoates
pp. 1
Oxidation of a 10-Dibenzo[,]thiopyran
pp. 1
Rearrangement of a 2-Thiabicyclo[3.1.0]hex-3-ene
pp. 1
3-2-Benzopyran-3-ones
pp. 1
Reaction of Enolates with Acyl Chlorides
pp. 1
Sulfonic Acids as Condensing Agents
pp. 1
Addition of Hydrogen Sulfide, or its Equivalent, to Dialkynyl Ketones
pp. 1
S-Alkylation of Thiopyranthiones
pp. 1
Diacylation of 1-Methylcycloalkenes or Methylenecycloalkanes
pp. 1
Dehydrogenation of 2-Thiopyrans
pp. 1
Zinc(II) Chloride as Condensing Agent
pp. 1
6-Dibenzo[,]pyran-6-thiones
pp. 1
Reduction of ,-Dihalo- and ,-Bis(acetyloxy)dibenzotelluropyranones
pp. 1
By Formation of Two S—C and Two C—C Bonds
pp. 1
Acid-Catalyzed Cyclization of Aryl 3-Ethoxyacrylates
pp. 1
Reaction of 1,3-Dihydro-2-indole-2-thiones with 1,3-Diketones
pp. 1
By Condensation of an α,β-Unsaturated Ketone and an α-Acyloxy Ketone
pp. 1
With Phosphorus Pentachloride
pp. 1
Addition of Hydrogen Sulfide in Ethanol
pp. 1
By Reaction of 5-Chloropenta-2,4-dienenitriles with Sodium Hydrogen Selenide
pp. 1
Sulfuric Acid as Condensing Agent
pp. 1
Cyclization of Ketones with Thiocarbonyl Compounds
pp. 1
Of Glycine Derivatives and Active Methylene Compounds to Enamino Ketones
pp. 1
Modification of Heteroatoms
pp. 1
Base-Catalyzed Condensation of 2,3-Dihydro-4-1-benzopyran-4-ones and Aldehydes
pp. 1
Cyclization of a Thioate
pp. 1
By Rearrangement of Substituted Benzo[]selenophen-3(2)-ones
pp. 1
By Formation of One O—C Bond and Two C—C Bonds
pp. 1
Reduction of 2-1-Benzopyran-2-ones and 4-1-Benzopyran-4-ones with a Metal
pp. 1
Reactions of Aldehyde and Ketone Enolates with Carboxylic Acid Esters
pp. 1
With Isolation of the Intermediate Tertiary Alcohol
pp. 1
By Elimination
pp. 1
Reaction of a 2-Hydroxybenzaldehyde (Salicylaldehyde) with a Carbaldehyde, Ketone, or Acetal
pp. 1
Transchalcogenation of 4-Thiopyran-4-thiones
pp. 1
Of Hydrogen
pp. 1
Synthesis from Hexa-1,5-diyn-3-ones
pp. 1
Cyclization of 2-Acyloxyphenyl Ketones with Inorganic Bases
pp. 1
By Formation of One S—C and One C—C Bond
pp. 1
From Diarylmethanes and Sulfur
pp. 1
From (2-Oxoalkyl)arenes or Their Acylated Enols with a Carboxylic Acid Derivative (as C1 Component)
pp. 1
Formal Oxidation State Changes Resulting from Tautomerism
pp. 1
In Situ Generation of the 3-Oxidopyrylium Salt by Migration of a Silyl Group
pp. 1
Dibenzo[,]pyrylium Salts
pp. 1
From 6-Dibenzo[,]thiopyrans with Sulfuryl Chloride/Perchloric Acid or Trifluoromethanesulfonic Acid
pp. 1
6-Dibenzo[,]thiopyran-6-ones and 6-Dibenzo[,]thiopyran-6-thiones
pp. 1
Introduction of C10 with 2-Chloro-1,1-diethoxyethane Followed by Dehydrohalogenation
pp. 1
4-Thiopyran-4-ones
pp. 1
Synthesis from 1,2-Dicarbofunctional Arenes
pp. 1
Transchalcogenation of Thiopyran-4-ones
pp. 1
Cyclization of 2-(2-Oxoethyl)benzonitriles
pp. 1
With Formation of the 1—2 Bond
pp. 1
Aromatization
pp. 1
By Reaction of 2-Bromophenyl Ethynyl Ketones with Sodium Hydrogen Telluride
pp. 1
Debromination of 3,4-Dibromo-3,4-dihydro-2-1-benzopyran-2-ones
pp. 1
Oxidation of 3-Benzylidene-2-phenyl-2,3-dihydro-4-1-benzopyran-4-ones
pp. 1
By S-Alkylation or S-Acylation
pp. 1
Thermolysis of 4′,5′-Dimethyl-3′,6′-dihydrospiro[9-xanthene-9,2′-2-thiopyran]
pp. 1
By Dimerization of Selenopyran-2-ylidene Aldehydes
pp. 1
Cyclization of Benzenethiols with Haloalkenones
pp. 1
Reaction of Thiophene-2- or Thiophene-3-thiols with 1,3-Diketones
pp. 1
Cyclization of 1-Aryl-3-hydroxy-3-(2-hydroxyaryl)propan-1-ones
pp. 1
By Formation of One O—C and One C—C Bond
pp. 1
Alkylation of Oxygen or Nitrogen Substituents
pp. 1
C10 Introduced by Dichloromethyl Methyl Ether/Tin(IV) Chloride
pp. 1
Condensation of a 1-Benzopyrylium Salt with a Carboxylic Acid Having an Activated Methylene Group, Combined with Disproportionation
pp. 1
From Alkynes and Carboxylic Acid Derivatives
pp. 1
Condensation of Benzenethiols with (2)-2-(Hydroxymethylene)cyclohexanones
pp. 1
Cyclization of 1-(2-Hydroxyphenyl)alkane-1,3-diones with Hydrogen Chloride
pp. 1
2-1-Benzothiopyran-2-ones and 2-1-Benzothiopyran-2-thiones
pp. 1
Synthesis of 6-Dibenzo[,]thiopyran-6-ones by Intramolecular Acylation
pp. 1
Condensation of 4-Alkylselenopyrylium Salts with Ethyl -Phenylformimidate
pp. 1
Intramolecular Friedel–Crafts Reaction
pp. 1
From 1-2-Benzothiopyrans
pp. 1
With Formation of the 5—6 Bond
pp. 1
Cyclization of 1-(2-Hydroxyphenyl)alkane-1,3-diones with Iodine
pp. 1
From Pyrylium Salts
pp. 1
Self-Condensation of 3-Oxo Esters and Related Compounds
pp. 1
By Chlorination of Selenopyran-4-ones Using Oxalyl Chloride
pp. 1
Cyclization of 2-(Methylsulfanyl)phenyl Alkynyl Ketones
pp. 1
Synthesis by Addition of Enolates to Propynoates and Haloacrylates
pp. 1
2,6-Diarylpyrylium Salts from 1-Arylpent-2-en-4-yn-1-ones
pp. 1
Synthesis of 6-Dibenzo[,]thiopyran-6-thiones by Intramolecular Friedel–Crafts Reaction of a Chloridodithiocarbonate
pp. 1
By Formation of One O—C Bond
pp. 1
Lactonization of 3-(2-Alkoxyphenyl)propanoic or -acrylic Acids
pp. 1
By Isomerization
pp. 1
By Condensation of Selenopyran-4-ones with 4-Methyl-2,6-diorganotelluropyrylium Salts
pp. 1
Oxidation of Catechols and Veratroles
pp. 1
4-Thiopyran-4-thiones
pp. 1
By Formation of Two S—C Bonds and One C—C Bond
pp. 1
Selenopyrylium Salts
pp. 1
Hydrolysis of 2-1-Benzopyran-2-thiones
pp. 1
Reaction Between Diphenylcyclopropenethione and Ylides
pp. 1
From 1-Benzothiopyran-4(4)-ones with Phosphoryl Chloride
pp. 1
Of Hydrogen
pp. 1
Electrophilic Substitution of 4-Pyran-4-ones
pp. 1
Addition of Enolates to Propynoates and Related Reactions
pp. 1
Baeyer–Villiger Reaction of 2,3-Dihydro-1-inden-1-ones with Subsequent Aromatization
pp. 1
Cyclization of 2-Vinylbenzoic Acids
pp. 1
Transformations of 2-1-Benzopyran-2-ones and 4-1-Benzopyran-4-ones by Reaction with C—H Acidic Pyrylium Salts
pp. 1
Cyclizations Utilizing β-Haloacrylates
pp. 1
By C-Formylation and C-Acylation of 1,3-Diketones and Their Derivatives
pp. 1
Conversion of 9-(Trimethylsilyl)-9-Xanthene into 9-Xanthene-9-thione -Oxide
pp. 1
By Formation of One Heteroatom—Carbon and One C—C Bond
pp. 1
Hydrolytic Ring Opening Followed by Ring Closure
pp. 1
Diels–Alder Reactions of 3-Vinyl-4-1-benzothiopyran-4-ones
pp. 1
Ring-Closing Metathesis of a Polymer-Supported 2-(Propenoyloxy)styrene
pp. 1
Oxidative Cyclization of Biphenyl-2-carboxylic Acid
pp. 1
Diacylation of Cycloalkenes
pp. 1
Synthesis by Ring-Closure Reactions
pp. 1
By Formation of One O—C and One C—C Bond
pp. 1
Reaction of 3-Aryl-3-chloroprop-2-eniminium Salts with Cyanoacetic Acid Derivatives and Sulfur Transfer Reagents
pp. 1
Benzo- and Dibenzotelluropyrylium Salts
pp. 1
Condensation of 1,3-Diketones with Orthoformates
pp. 1
Synthesis by Ring Transformation
pp. 1
Synthesis from 3-Acyl-2-1-benzopyran-2-ones
pp. 1
Intramolecular Aldol Reactions
pp. 1
Intramolecular Condensation of (Arylsulfanyl)ketones and Subsequent Intermolecular Disproportionation
pp. 1
From 2-1-Benzothiopyrans
pp. 1
1-2-Benzopyran-1-thiones
pp. 1
By Cyclization of Phenyl Selenocinnamates
pp. 1
Palladium-Catalyzed Cyclization of 2-Bromobenzoates
pp. 1
By Cyclization of Carboxyvinyl Phenyl Tellurides
pp. 1
2-Benzothiopyrylium Salts
pp. 1
Lactonization of 3-(2-Alkoxy- and 3-(2-Hydroxyphenyl)acrylonitriles
pp. 1
Aluminum Trichloride as Condensing Agent
pp. 1
Oxidative Cyclization of 2-Allylphenols
pp. 1
Cyclization with Stoichiometric Palladium
pp. 1
From 4-1-Benzothiopyrans
pp. 1
Oxidation of a 3,4-Dihydro-2-1-benzothiopyran-2-one
pp. 1
Oxidative Cyclization of 1-Aryl-3-(2-hydroxyaryl)propan-1-ones
pp. 1
Cyclization of ,-Dialkyl-3-(2-hydroxyphenyl)-3-oxopropanamides
pp. 1
Polyphosphoric Acid Catalyzed Intramolecular Friedel–Crafts Acylation of 2-Phenoxybenzoic Acids
pp. 1
Lewis Acid Catalyzed Condensation of Phenols and Naphthols with 2-Hydroxybenzoic Acids
pp. 1
Reaction of (2,6-Di--butyl-4-oxo-4-telluropyran-3-yl)lithium with Benzaldehyde
pp. 1
Direct Substitution
pp. 1
Synthesis by Substituent Modification
pp. 1
Cyclization of 2-Substituted Arylacetic Acids
pp. 1
S-Functionalization and Substitution of 2-Thiopyran-2-thiones with Oxalyl Halides or Phosphorus Pentachloride
pp. 1
[C + C] Forming a C-Chain from Two Synthons
pp. 1
Coupling of Phenols and Acetylenedicarboxylates Using Triphenylphosphine
pp. 1
Aromatization
pp. 1
Cyclization of 1-(2-Hydroxyphenyl)alkane-1,3-diones with 4-Toluenesulfonic Acid
pp. 1
Hydride Abstraction from Dihydrothiopyran-3-ones
pp. 1
Palladium-Catalyzed Carbonylative Annulation of Internal Alkynes by 2-Iodophenols
pp. 1
Cyclization of 1-(2-Hydroxyphenyl)prop-2-yn-1-ones with Secondary Amines
pp. 1
Cyclizations Utilizing Carbon Dioxide
pp. 1
With Formation of the 4a—10 and 9—9a, the 8a—9 and 10—10a, the 4a—10 and 8a—9, or the 9—9a and 10—10a Bonds
pp. 1
Lactonization of 2′-Methoxybiphenyl-2-carboxylic Acids
pp. 1
With Formation of the 7—8 Bond
pp. 1
4-Selenopyran-4-ones by Oxidation of 4-Methylene-4-selenopyrans
pp. 1
By Formation of One C—C Bond
pp. 1
Lithiation of 4-1-Benzoselenopyran-4-ones
pp. 1
Acylation of Aromatic Hydrocarbons, Aromatic Heterocycles, or Phenol Ethers
pp. 1
Lactonization of Hydroxy Amides
pp. 1
-Arylation Using 2-Halobenzoic Acids with Subsequent Acid-Mediated Cyclization
pp. 1
From 4-Hydroxy-2-pyran-2-ones
pp. 1
Elimination of Benzenesulfinic Acid from 3-Alkyl-3-(phenylsulfonyl)-2,3-dihydro-4-benzopyran-4-ones
pp. 1
Reaction of 3-[(Dialkylamino)methylene]-4-thioxo-3,4-dihydro-2-1-benzopyran-2-ones with Propenal
pp. 1
2,4,6-Triarylpyrylium Salts from Acetophenone Derivatives by Cleavage of an Aroyl Group from an Initially Formed 1,3-Diarylbut-2-en-1-one Derivative
pp. 1
By Ring Enlargement
pp. 1
Diacylation of Acyclic Propene Derivatives
pp. 1
2-Selenopyran-2-ones and 4-Selenopyran-4-ones
pp. 1
Aromatization by Dehydrogenation and Redox Reactions
pp. 1
Synthesis by Ring Transformation
pp. 1
From Rearrangements of 4-Pyran-4-ones
pp. 1
Base-Catalyzed Cyclization of 1-(2-Hydroxyphenyl)prop-2-yn-1-ones
pp. 1
Reaction of Ethyl 4-Oxo-4-1-benzopyran-3-carboxylates with Hydroxylamine
pp. 1
4-Telluropyran-4-thiones from 4-Telluropyran-4-ones
pp. 1
Benzo- and Dibenzoselenopyrylium Salts
pp. 1
Of Carbon Functionalities
pp. 1
4-1-Benzothiopyran-4-ones and 4-1-Benzothiopyran-4-thiones
pp. 1
Substitution of Existing Substituents
pp. 1
Cyclization of 2-Acyloxyphenyl Ketones
pp. 1
Direct Thionation of 9-Xanthen-9-one with Lawesson's Reagent
pp. 1
Intramolecular Heck Reaction
pp. 1
Synthesis by Ring-Closure Reactions
pp. 1
Synthesis by Ring Transformation
pp. 1
Hydrolysis of 3-Acetyl- and 3-(Ethoxycarbonyl)-2-1-benzopyran-2,4(3)-diones
pp. 1
Reaction of (2,6-Di--butyl-4-oxo-4-selenopyran-3-yl)lithium with Electrophiles
pp. 1
From 2-(Chloroselanyl)benzoyl Chloride via Electrophilic Aromatic Substitution
pp. 1
From Ketones or Their Synthetic Equivalents and β-Chloro-α,β-unsaturated Ketones or Aldehydes
pp. 1
Cyclization of Carbon Dioxide and Two Alkynes
pp. 1
Rhodium-Catalyzed Carbonylative Cyclization of (2-Hydroxyphenyl)alkynes
pp. 1
Intramolecular Condensation of (Arylsulfanyl)ketones in the Presence of Trityl Chloride/Perchloric Acid
pp. 1
Condensation of a 2-Sulfanylbenzoic Acid with a β-Diketone
pp. 1
Cyclization of 2′-Nitrobiphenyl-2-carboxylic Acids
pp. 1
Ring Closure of a 3-(2-Carboxymethylaryl)-2-benzopyrylium Salt with Phosphorus Pentachloride
pp. 1
Sulfonic Acid Resins as Condensing Agents
pp. 1
By Reaction of Se-Lithiated Selenosalicylamide Derivatives with Benzyne
pp. 1
Ring Closure of the -Acylenol Form of Aryl Benzyl Ketones with Polyphosphoric Acid
pp. 1
Cyclization of 2-(2-Nitrobenzylidene)malonic Acids
pp. 1
Ring Enlargement
pp. 1
Base-Catalyzed Cyclization of -(2-Acetylphenyl) Dialkylthiocarbamate Esters
pp. 1
By Formation of One Se—C and One C—C Bond
pp. 1
From Methyl(ene) Ketones and Enols or Other Derivatives of 1,3-Dicarbonyl Compounds
pp. 1
1-2-Benzothiopyran-1-ones and 1-2-Benzothiopyran-1-thiones
pp. 1
Deprotonation
pp. 1
By Dehydration of Telluropyran-4-ols
pp. 1
Zinc-Catalyzed Coupling of Phenols with Alkynoates
pp. 1
Aromatization of 2-1-Benzopyran-2-ones by Addition of a Grignard Reagent and Dehydroxylation
pp. 1
Substitution
pp. 1
Cyclization of an -Aryl 3-Phenylprop-2-enethioate Ester
pp. 1
Reaction of Phosphorus Ylides with a 2-(Benzoylsulfanyl)benzoate Derivative
pp. 1
Condensation of a 2-Sulfanylbenzoic Acid with an Arene
pp. 1
4-Selenopyran-4-ones by Addition of Dibasic Selenide to Diethynyl Ketones
pp. 1
With Formation of the 1—2, 2—3, and 4—4a Bonds
pp. 1
By Photochemical Rearrangement of Aryl Selenoesters
pp. 1
From 2-Carboxyphenylacetic Acid and Acid Chlorides
pp. 1
By Electrophilic Cyclization of Methyl Tellurides
pp. 1
Cycloaddition of 4-Thioxo-4-1-benzopyran-3-carbonitriles and Buta-1,3-dienylamines
pp. 1
Of Carbon
pp. 1
Lactonization of 3-(2-Hydroxyphenyl)propanoic or -acrylic Acids
pp. 1
By Formation of One Se—C Bond
pp. 1
Rearrangement of Phenyl Benzoates with Subsequent Intramolecular Friedel–Crafts Cyclization
pp. 1
With Formation of the 2—3 and 4—4a Bonds
pp. 1
Synthesis of 2-1-Benzothiopyran-2-thiones by Rearrangement of Allyl Phenyl Sulfides and Oxidation
pp. 1
Acid-Catalyzed or Thermal Cyclization of Diaryl Malonates
pp. 1
Rearrangement of [(2-Hydroxybenzylidene)amino]acetates and ′-(2-Hydroxybenzylidene)acetohydrazides
pp. 1
Hydrolysis of Benzotelluropyrylium Salts
pp. 1
Aromatization
pp. 1
By Isomerization of 4-Methylenetelluropyrans
pp. 1
Use of Phosphorus Pentasulfide
pp. 1
10-Dibenzo[,]thiopyran-10-ones and 10-Dibenzo[,]thiopyran-10-thiones
pp. 1
Cyclization of 1-(2-Hydroxyphenyl)alkane-1,3-diones with Hydrogen Bromide
pp. 1
By Reaction of 2-Bromophenyl Ethynyl Ketones with Sodium Hydrogen Selenide
pp. 1
Reaction of a Phenol with a 3-Chlorovinyl Aldehyde
pp. 1
Of Oxygen Functionalities
pp. 1
Other Electrophilic Cyclizations of 3-(Dialkylamino)-1-(2-hydroxyphenyl)prop-2-en-1-ones
pp. 1
Reaction of 2-Bromobenzonitriles with Phenols and Phenyl Ethers
pp. 1
Ring Closure of 3-(2-Hydroxyaryl)prop-2-en-1-ones
pp. 1
Transchalcogenation of 2-Thiopyran-2-thiones
pp. 1
Cyclization of Solid-Supported 1-(2-Hydroxyphenyl)alkane-1,3-diones with Trifluoroacetic Acid
pp. 1
Cyclization of 2-Acyloxyaryl Ketones and Cyanides
pp. 1
Condensation of 2-Hydroxybenzaldehydes with Acetic Anhydride
pp. 1
By Ring Expansion
pp. 1
With Formation of the 7—8 and 9—10 Bonds
pp. 1
Reaction of Enols and Enolates with Malonyl Chlorides
pp. 1
Lewis-Acid Mediated Hydrolysis
pp. 1
Base-Catalyzed Cyclization of 2-Acyloxybenzoates
pp. 1
From Benzil and Cyclopentadiene
pp. 1
Cyclization of an -Aryl β-Oxo Thioate Ester
pp. 1
With Hydrogen Sulfide in the Presence of a Lewis Acid
pp. 1
Decarboxylation
pp. 1
Tautomerization of a 4-Hydroxy-2-1-benzothiopyran-2-thione
pp. 1
With Formation of the 5—6 and 10a—10b Bonds
pp. 1
Synthesis by Substituent Modification
pp. 1
Cyclization of an -Aryl 3-Methoxyprop-2-enethioate Ester
pp. 1
With Formation of the 2—3 and 3—4 Bonds
pp. 1
Condensation of 2- and 4-Alkylselenopyrylium Salts with Carbonyl Compounds
pp. 1
Aromatization
pp. 1
By Aromatization of Selenopyrans
pp. 1
Condensation of 2-Hydroxyphenyl Ketones with Carboxylic Acids
pp. 1
By Methylation of Selenopyran-4-ones
pp. 1
From Enol Derivative Reactions of 3,5-Dioxo Esters
pp. 1
Substitution of Halogen
pp. 1
Knoevenagel Condensation of 2-Hydroxybenzaldehyes with Ethyl Nitroacetate
pp. 1
N-Protonation or N-Alkylation of Thiopyranimines
pp. 1
[3 + 2]-Cycloaddition Reactions of 3-Oxidopyrylium Salts
pp. 1
Reaction of 1-2-Benzothiopyran-4(3)-ones with Triphenylcarbenium Perchlorate
pp. 1
Via Anion Stripping by Sodium Borohydride and Carboxylic Acids
pp. 1
By Formation of One O—C and Two C—C Bonds
pp. 1
Aromatization by Dehydrogenation of 10-Dibenzo[,]pyrans
pp. 1
By Formal Aromatizations Resulting from Tautomerism
pp. 1
Ring Closure of 2,2′-Disubstituted Benzophenones
pp. 1
From α,β-Unsaturated Ketones and 1,3-Diketones, 3-Oxo Esters, or α-Acyloxy Ketones
pp. 1
Substitution of Oxygen
pp. 1
Synthesis by Ring Transformation
pp. 1
Synthesis by Substituent Modification
pp. 1
With Phosphorus Pentasulfide
pp. 1
Thermal Condensation of Phenols and Naphthols with 2-Hydroxybenzoates
pp. 1
Modification of Substituents
pp. 1
Base-Catalyzed Condensation of 2-Hydroxyphenyl Methyl Ketones and 2-(Methoxycarbonyl)phenylacetates
pp. 1
Base-Catalyzed Lactonization of 3-(2-Alkoxyphenyl)- and 3-(2-Acyloxyphenyl)acrylates
pp. 1
Dehydrogenation of 3,4-Dihydro-2-1-benzopyran-2-ones with Other Agents
pp. 1
Reaction of 4-Acyl-3,4-dihydro-2-1-benzopyran-2-ones with Secondary Amines
pp. 1
By Formation of One S—C and Two C—C Bonds
pp. 1
From 2-Chlorobenzoic Acid Derivatives by Halogen–Metal Exchange and Reaction with Carbon Disulfide and Iodomethane
pp. 1
Condensation of 2-Hydroxyphenyl Ketones with Diaminomethyl Ethers, Formamide Acetals, or Ortho Esters
pp. 1
Cyclization of 1-(2-Hydroxyphenyl)prop-2-en-1-ones with Hypervalent Iodine Reagents
pp. 1
Introduction of C10 with an Arylcarboxylic Acid Equivalent
pp. 1
From ,,′,′-Tetramethyl-4,4′-methylenedianiline and Selenious Acid
pp. 1
Dibenzo[,]thiopyrylium Salts
pp. 1
4-1-Benzopyran-4-ones
pp. 1
From Methyl(ene) Ketones or Their Synthetic Equivalents and 2-Benzylidenecyclohexanone Derivatives
pp. 1
Cyclization Using Palladium and Lithium Catalysis
pp. 1
By O-Alkylation
pp. 1
From 6-Hydroxy-6-dibenzo[,]thioprans with Perchloric Acid
pp. 1
Deprotonation and Alkylation
pp. 1
Cyclization of Benzenethiols with Alkynals
pp. 1
Miscellaneous Reactions
pp. 1
Knoevenagel Condensation of 2-Hydroxybenzaldehyes or 2-Hydroxyphenyl Ketones with Ethyl Cyanoacetate
pp. 1
Cyclization of 1-(2-Fluorophenyl)-1,3-diones
pp. 1
Dehydration–Hydride Abstraction of Fused Dihydrothiopyranols or Tetrahydrothiopyranols
pp. 1
Halogenation
pp. 1
Condensation of a Benzenethiol Derivative with a β-Oxo Ester
pp. 1
With Formation of the 1—9a and 4—4a Bonds
pp. 1
Substitution of Oxygen and Sulfur Groups
pp. 1
Aromatization of a 2-Amino-2-benzopyran by Protonation Combined with Elimination of the Amino Group
pp. 1
By Oxidation
pp. 1
From 3,4-Dihydro-2-1-benzothiopyrans
pp. 1
Oxidation of 4-Methylene-4-telluropyrans
pp. 1
Reaction of Diarylsulfanes with 1,1-Dichlorodimethyl Ether
pp. 1
Condensation of Methyl(ene) Ketones with Orthoesters
pp. 1
Reaction of a Phenol with a Vinyl Ketone
pp. 1
Cyclization of 3-[2-(-Butylsulfanyl)phenyl]prop-2-enenitriles and Related Compounds
pp. 1
From 2-Aminovinyl Selenoketones and Active Methylene Compounds
pp. 1
Dehydrohalogenation
pp. 1
Cyclization of 2-Allylbenzoic Acids
pp. 1
Reaction of Buta-1,3-dienes with Thiophosgene
pp. 1
Pyrylium Salts from Methyl(ene) Ketones and Aldehyde Derivatives (Acetals, Acylals)
pp. 1
Lewis Acid Catalyzed Cyclization of Aryl 3-Phenylacrylates
pp. 1
Dehydration of 2-Hydroxy-2,3-dihydro-4-1-benzopyran-4-ones
pp. 1
By Formation of Two Heteroatom—Carbon Bonds
pp. 1
Reaction of 2-Acylphenols (2-Hydroxyacetophenones or 2-Hydroxybenzophenones) with α-Methylene Ketones
pp. 1
2-Pyran-2-ones
pp. 1
Reduction and Dehydration of 10-Dibenzo[,]pyran-10-ones
pp. 1
Oxidation with Manganese Reagents
pp. 1
Addition of Dihalogen to the Tellurium Atom
pp. 1
Rearrangements of 4-1-Benzopyran-4-one Containing Systems
pp. 1
From 5-Oxo Unsaturated Esters
pp. 1
Modification by Addition to Alkyne Substituents
pp. 1
By Cleavage of Alkoxy or Acyloxy Substituents
pp. 1
2,6-Diarylpyrylium Salts by Acylation of Aralkyl Ethers with Glutaric Acid
pp. 1
Dimerization of an -Methylquinone
pp. 1
By Dehydration of Benzotelluropyran-4-ols
pp. 1
Electrophilic Substitution of 2-Pyran-2-ones
pp. 1
With Formation of the 4a—10 or 10—10a Bonds
pp. 1
Nitrosation of 2,6-Dialkylselenopyrylium Salts
pp. 1
Base-Catalyzed Ring Closure of (2-Hydroxyphenyl)(2-halo- or 2-methoxyphenyl)methanones
pp. 1
Reaction of 2-Hydroxybenzoates with Ylides and Acyl Chlorides
pp. 1
2-Arylvinyl- and 4-Arylvinyl-Substituted Pyrylium Salts
pp. 1
Condensation of 2-Hydroxybenzoic Acid Derivatives with 2-Hydroxybenzaldehydes and Naphthaldehydes
pp. 1
Cyclization of 1-(2-Alkoxyphenyl)alkane-1,3-diones with Hydrogen Iodide
pp. 1
Cyclization of 3-(Dialkylamino)-1-(2-hydroxyphenyl)prop-2-en-1-ones with Halogens
pp. 1
By Acid-Induced Disproportionation
pp. 1
Reduction of Thiopyranones with Hydrides and Subsequent Elimination
pp. 1
Lithiation and Carboxylation of Diphenyl Ethers
pp. 1
By Oxidation of Furans
pp. 1
Replacement of an Alkoxy Group by a Substituted Amino Group
pp. 1
Knoevenagel Condensation of 2-Hydroxybenzaldehydes with Acrylates
pp. 1
Nucleophilic Addition to the Carbonyl Group of 6-Dibenzo[,]pyran-6-ones Followed by Dehydration
pp. 1
Base-Mediated Cyclization with Carbon Disulfide
pp. 1
By Elimination
pp. 1
Substitution of Existing Substituents
pp. 1
Condensation of 2-Hydroxyphenyl Ketones with Carboxamides
pp. 1
By Annulation to an Arene
pp. 1
With Formation of the 1—2, 3—4, and 4—4a Bonds
pp. 1
Of Silicon
pp. 1
Of Nitrogen
pp. 1
Condensation of 2-Hydroxyphenyl Ketones with Aldehydes with Subsequent Oxidation
pp. 1
Oxidation of 2-1-Benzopyran-2-ols
pp. 1
Synthesis of 4-Hydroxy-2-1-benzothiopyran-2-ones by Condensation of Benzenethiols with Malonic Acid Derivatives
pp. 1
Condensation of 2-Hydroxybenzaldehyes with Other Arylacetic Acid Derivatives
pp. 1
Synthesis from 5-Oxo Esters and Related Compounds
pp. 1
From Arylacetones with an Aliphatic Carboxylic Anhydride and Perchloric Acid
pp. 1
1-Benzopyrylium Salts (Including Flavylium Salts)
pp. 1
Introduction of C10 with an Arylaldehyde
pp. 1
Oxidation of a 2,3-Dihydro-4-1-benzothiopyran-4-one
pp. 1
Cycloaddition of 3-(Phenylsulfinyl)-4-1-benzopyran-4-ones and Danishefsky's Diene
pp. 1
Reaction of Phenols with 3-(Dialkylamino)acrylates and Cinnamates
pp. 1
Of Oxygen
pp. 1
Cyclization of Thallated Benzoic Acids with Alkenes under Palladium Catalysis
pp. 1
Interconversion of Carboxy Functions
pp. 1
4-Hydroxy-2-1-benzopyran-2-ones by Carbonylation of 2-Hydroxyphenyl Ketones
pp. 1
Acid-Catalyzed Lactonization of 3-(2-Hydroxyphenyl)propanoates or -acrylates
pp. 1
By Condensation of 4-Alkyltelluropyrylium Salts with Carbonyl and Thiocarbonyl Compounds
pp. 1
By Formation of One C—C Bond
pp. 1
Using Acyclic Thiocarbonyl Compounds
pp. 1
With Formation of the 6a—7 and 10—10a Bonds
pp. 1
With Formation of the 1—9a Bond
pp. 1
Alkylation, Formylation, and Friedel–Crafts Reactions
pp. 1
Synthesis by Substituent Modification
pp. 1
By Formation of One Heteroatom—Carbon and One C—C Bond
pp. 1
By Decarbonylation or Decarboxylation of Dibenzoselenopyrans
pp. 1
Ring Closure of 2-Cyano-1-(2-oxoalkyl)arenes
pp. 1
From Unsaturated 1,5-Diketones with Hydrogen Sulfide
pp. 1
Acid-Catalyzed Cyclization of 1-(2-Hydroxyphenyl)prop-2-yn-1-ones
pp. 1
Reaction of a 2-Hydroxybenzaldehyde (Salicylaldehyde) with Aliphatic or Alicyclic α,α′-Bis(methylene) Ketones
pp. 1
By Aromatization of Benzo- and Dibenzoselenopyrans
pp. 1
Condensation of 2-Hydroxyphenyl Ketones with Carboxylic Acid Anhydrides
pp. 1
Introduction of C10 with an Aldehyde Acetal
pp. 1
Reaction of 2-Thiopyran-2-thiones with Peroxyacetic Acid
pp. 1
Coupling of 2-Iodobenzenethiol, an Allene, and Carbon Monoxide
pp. 1
Carbonyl and Carboxy Substituents
pp. 1
Cyclization of 2-(Arylsulfanyl)benzoic Acids
pp. 1
Ring Closure of 2-Acyl-1-(2-oxoalkyl)arenes
pp. 1
Cyclization of 2-(Formylmethyl)benzoates
pp. 1
Thermal Cyclization of 2-Acyloxyphenyl Ketones
pp. 1
From 4-Hydroxy-3,4-dihydro-2-1-benzothiopyrans
pp. 1
With an α-Methylene Aldehyde or Acetal
pp. 1
Pyrylium Ring Closure from a Preformed Acyclic C Chain
pp. 1
Photocyclization of a 2-(Diazoacetyl)benzoate
pp. 1
By the Simonis Reaction
pp. 1
Condensation of Phenols with 1,3-Dicarbonyl Compounds (The Simonis Reaction)
pp. 1
By Protonation of Pyranones or Pyranthiones
pp. 1
From 4-Hydroxy-3,4-dihydro-2-1-benzothiopyran -Oxides
pp. 1
With Formation of the 4a—5 Bond
pp. 1
Dehydration of 10-Dibenzo[,]thiopyran-10-ones
pp. 1
Synthesis of 3-Substituted 2-1-Benzopyran-2-ones by Knoevenagel Condensation of Substituted Acetic Acid Derivatives
pp. 1
Oxidation of 1,2,3,4,4a,9a-Hexahydro-9-xanthen-9-ones Using Palladium on Charcoal
pp. 1
Reaction of 4-Acyl-1-2-benzopyran-1,3(4)-diones with Hydrazine
pp. 1
By Condensation of 4-(Formylmethylene)telluropyrans with 4-Alkyl-2,6-diorganochalcogenopyrylium Salts
pp. 1
Synthesis by Electrocyclization
pp. 1
By Dehydrogenation of 2,3-Dihydro-4-1-benzoselenopyran-4-ones
pp. 1
Reaction of a 2-Hydroxybenzaldehyde (Salicylaldehyde) with an α-Methylene Carboxylic Acid Derivative
pp. 1
By Formation of One O—C and Two C—C Bonds
pp. 1
Oxidation of Benzoselenopyrans
pp. 1
2-Thiopyran-2-thiones
pp. 1
Cyclization with Palladium Catalysts and Oxygen
pp. 1
With Formation of the 8a—9 and 9—9a Bonds
pp. 1
From α,β-Unsaturated Ketones and Cyclic Ketones
pp. 1
Lithiation of 4-Telluropyran-4-ones
pp. 1
By Formal Exchange of Ring Members with Retention of Ring Size
pp. 1
From Bis-selenocyanates
pp. 1
9-Xanthen-9-ones
pp. 1
Acylation of 3-Acyl-3,4-dihydro-2-1-benzopyran-2-ones
pp. 1
Sulfanylation
pp. 1
With Formation of the 4—5 Bond
pp. 1
Directly from Two Equivalents of α,β-Unsaturated Ketones
pp. 1
Modification of Substituents
pp. 1
Oxidative Cyclization of 1-(2-Hydroxyphenyl)prop-2-en-1-ones with Alkaline Peroxide
pp. 1
Reaction of Phosphacumulenes with 2-Hydroxybenzaldehydes
pp. 1
Condensation of α-Oxo Carboxylic Esters with Benzaldehydes
pp. 1
Lactonization of 3-(2-Hydroxyphenyl)acrylamides
pp. 1
Ring Closure of an -Acyloxybiphenyl Derivative with Polyphosphoric Acid
pp. 1
Neutral, Thermal Lactonization of 3-(2-Hydroxyphenyl)propanoates or -acrylates
pp. 1
By Protonation of 4-Methylene-4-selenopyrans
pp. 1
By Alkylation of 4-Telluropyran-4-ones
pp. 1
Metathetic Exchange of Anions Made Possible by Solubility Differences, or by Ion-Exchange Resins
pp. 1
Dehydrogenation of a Dibenzo[,]pyran by Phosphorus Pentachloride/Thionyl Chloride
pp. 1
Pyrylium Salts from 5-Oxopent-2-enenitriles or Their Tautomers
pp. 1
From 4-Pyrans
pp. 1
Base-Catalyzed Condensation of 2-Methylbenzoates and 4-Methoxy-2-pyran-2-ones
pp. 1
Reactions of Substituents Other than Alkyl Groups
pp. 1
Decarboxylation
pp. 1
Cyclization with -(Phenylselanyl)succinimide and Acid
pp. 1
From Enols and Glycine Derivatives
pp. 1
Formation of Pyrylium Salts by Dehydrocyclizations of Pentane-1,5-diones
pp. 1
Reaction of Ylides with Diphenylcyclopropenone
pp. 1
Reaction of Enamines with Carbon Disulfide
pp. 1
O-Methylation of 2-1-Benzopyran-2,4(3)-diones
pp. 1
Knoevenagel Condensation of 2-Hydroxybenzaldehydes with Phosphorylacetate Derivatives
pp. 1
S-Alkylation of 4-Hydroxy-2-1-benzopyran-2-thiones
pp. 1
Lithiation of 4-1-Benzotelluropyran-4-one
pp. 1
Cyanide-Catalyzed Rearrangement of 2-Benzylidenebenzo[]furan-3-ones
pp. 1
Addition of Thioureas
pp. 1
With Hydrogen Sulfide in the Presence of Acid
pp. 1
By Hydrolysis and Cyclization of a Rhodanine Derivative
pp. 1
Intramolecular Friedel–Crafts Acylation via Mixed Anhydride Formation
pp. 1
Ring Closure of Bis(2-hydroxyphenyl)methanones
pp. 1
Transformation of an Enol Lactone of a Benzyl 2-(Carboxymethyl)aryl Ketone with an Acid Anhydride and Perchloric Acid
pp. 1
By Formation of Two C—C Bonds
pp. 1
With Formation of the 4—4a Bond
pp. 1
Preparation of Benzo- and Dibenzotelluropyranthiones Using Lawesson's Reagent
pp. 1
With Formation of the 1—2 and 1—8a Bonds
pp. 1
Synthesis of 6-Dibenzo[,]thiopyran-6-ones from Dibenzo[,]thiophene by Reductive Cleavage, Condensation with Carbon Dioxide, and Cyclization
pp. 1
Condensation of 3-Aminoprop-2-enethiones and Cyanoacetic Acid Derivatives
pp. 1
Nafion-H Resin-Catalyzed Intramolecular Friedel–Crafts Acylation of 2-Phenoxybenzoic Acids
pp. 1
By Formal Exchange of Ring Members with Retention of Ring Size
pp. 1
Oxidation of the Selenium Atom
pp. 1
Synthesis of Product Class 5
pp. 1
By Condensation of 4-Alkyl-1-benzoselenopyrylium and 10-Alkyldibenzoselenopyrylium Salts with Aldehydes
pp. 1
Indirect Thionation of 9-Xanthen-9-ones via Imines
pp. 1
Synthesis of 4-Hydroxy-2-1-benzothiopyran-2-thiones by Condensation of 2-Chlorophenyl Ketones with Carbon Disulfide
pp. 1
Oxidation of 2-1-Benzopyrans to 4-1-Benzopyran-4-ones
pp. 1
Lithiation of 4-Selenopyran-4-ones
pp. 1
Trifluoroacetic Acid Catalyzed Condensation of Phenols with 1,3-Dicarbonyl Compounds
pp. 1
1-2-Benzopyran-1-ones
pp. 1
Thermal Rearrangement by Reversible Electrocyclic Ring Opening
pp. 1
O-Functionalization and Substitution of 4-Thiopyran-4-ones with Thionyl Chloride or Phosgene
pp. 1
Intramolecular Friedel–Crafts Alkylation of 1-Naphthyl Acetates
pp. 1
From 10-Dibenzo[,]thiopyrans with Bromine or by Reaction with Triphenylcarbenium Perchlorate
pp. 1
Using Catalytic Palladium
pp. 1
By O-Alkylation
pp. 1
Synthesis of 4-Hydroxy-2-1-benzothiopyran-2-ones by Claisen Condensation of a 2-Sulfanylbenzoate Ester with an Acetate Ester
pp. 1
Formation of Pyrylium Salts by Addition to 2,6-Disubstituted Pyrylium Cations
pp. 1
Grignard Addition and Dehydration of 1-Benzothiopyran-4(4)-ones
pp. 1
Formation of ,-Diacetates
pp. 1
Intramolecular Bayliss–Hillman Reaction of 2-Formylphenyl Acrylate
pp. 1
By Formation of One O—C Bond
pp. 1
By Formation of One Te—C and One C—C Bond
pp. 1
In Situ Generation of the 3-Oxidopyrylium Salt from Methyl 2-(Diazoacetyl)benzoate
pp. 1
Ring Closure of 1-(2-Hydroxyaryl)-3-phenylpropane-1,3-diones (2′-Hydroxydibenzoylmethanes)
pp. 1
Condensation of 2-Hydroxyphenyl Ketones with Carboxylic Acid Derivatives
pp. 1
By Annulation to the Heterocyclic Ring
pp. 1
Modification of Substituents
pp. 1
Conversion of 10-Dibenzo[,]thiopyran-10-ones into 10-Dibenzo[,]thiopyran-10-thiones
pp. 1
Cyclization Using Preformed Copper Acetylides
pp. 1
By Elimination
pp. 1
Condensation of Phenols with Alkynoic Acids or Acid Chlorides
pp. 1
Reaction of Phenols with Alkynoates and Alkynoic Acids
pp. 1
Cyclization of 3-(Dialkylamino)-1-(2-hydroxyphenyl)prop-2-en-1-ones with Chlorosulfonyl Isocyanate and Anilines
pp. 1
Direct Thionation of 2-1-Benzopyran-2-ones with Phosphorus Pentasulfide
pp. 1
Oxidation of 4-1-Benzopyrans to 4-1-Benzopyran-4-ones
pp. 1
With Formation of the 1—2 and 4—4a Bonds
pp. 1
Oxidation of 6-Dibenzo[,]pyran-6-thione
pp. 1
[C + C + C] Condensation of Methyl(ene) Ketones or Their Equivalents with Aldehydes, Orthoesters, or Their Derivatives
pp. 1
Formation of Pyrylium Salts from Pent-2-ene-1,5-diones (Pyrylium Pseudobases) and -dioates
pp. 1
From 4-Alkylidene-4-1-benzothiopyrans
pp. 1
Aromatization
pp. 1
By Acid-Catalyzed Rearrangement
pp. 1
Dehydration of (2-Acylphenyl)acetic Acids with Acetic Anhydride or Carbodiimides
pp. 1
Formation of Pyrylium Salts from 3-Hydroxypenta-1,4-diynes
pp. 1
Use of Lawesson's Reagent
pp. 1
Conversion of 4-1-Benzopyran-4-ones into 4-1-Benzopyran-4-thiones
pp. 1
By Condensation of 4-Alkyl-1-benzo- and 10-Alkyldibenzo[,]selenopyrylium Salts with Formamides
pp. 1
Using Stoichiometric Palladium
pp. 1
9-Xanthene-9-thiones
pp. 1
Substitution of Hydrogen
pp. 1
Cyclization of 3-Halo-1-(2-hydroxyphenyl)prop-2-en-1-ones
pp. 1
Reaction with P-Nucleophiles
pp. 1
Cyclization of 1-(2-Alkoxyphenyl)- or 1-(2-Hydroxyphenyl)alkane-1,3-diones with Acetic Acid
pp. 1
Benzo- and Dibenzotelluropyranones
pp. 1
Addition Reactions
pp. 1
Cyclization of 3-(Dialkylamino)-1-(2-hydroxyphenyl)prop-2-en-1-ones with Sulfuric Acid
pp. 1
By Formation of Two Te—C Bonds
pp. 1
Reaction of 5-(Dimethylamino)penta-2,4-dienethioamides with Perchloric Acid
pp. 1
Cyclization of 1-(2-Hydroxyphenyl)prop-2-en-1-ones with Iodine
pp. 1
By Formation of Two S—C Bonds
pp. 1
By Aromatization of Telluropyrans
pp. 1
Cyclization of an 2-[2-(Acetylsulfanyl)benzoyl]-3-oxobutanoate
pp. 1
Palladium- or Nickel-Catalyzed Carbonylative Cyclization of 2-Iodobenzyl Ketones
pp. 1
By Hydride Abstraction from a Preformed Pyran System
pp. 1
Reaction with ,-Dialkylanilines
pp. 1
Synthesis by Ring Transformation
pp. 1
Alkenyl and Aryl Coupling Reactions
pp. 1
Synthesis by Substituent Modification
pp. 1
Metalation of 2-Pyran-2-ones
pp. 1
By Modification of Oxygen Functionalities
pp. 1
From 2-Halobenzoates via Palladium Catalysis Followed by Acid-Mediated Cyclization
pp. 1
Condensation of 2-Hydroxybenzaldehydes and 2-Hydroxyphenyl Ketones with Acetic Acid Derivatives
pp. 1
Telluropyrylium Salts
pp. 1
By Protonation of Alkylidenethiopyrans
pp. 1
Intramolecular Friedel–Crafts Acylation of 2-Phenoxybenzoic Acids Catalyzed by Phosphorus Pentoxide/Methanesulfonic Acid
pp. 1
From Tetrahydropyren-3-one
pp. 1
From 4-Hydroxy-4-1-benzothiopyrans
pp. 1
Carboxy Substituents
pp. 1
Base-Catalyzed Reaction of 2-Hydroxyphenyl Ketones with Diethyl Carbonate
pp. 1
Base-Catalyzed Dehydrohalogenation of 3-Halo-3,4-dihydro-2-1-benzopyran-2-ones
pp. 1
Halogen–Metal Exchange
pp. 1
Substitution of Existing Substituents
pp. 1
By Formation of Two C—C Bonds
pp. 1
Lactonization of 3-(2-Alkoxyphenyl)- or 3-(2-Acyloxyphenyl)acrylates
pp. 1
Conversion of 1-2-Benzopyran-1-ones into 1-2-Benzopyran-1-thiones with Lawesson's Reagent
pp. 1
With a 2-Arylvinyl Methyl Ketone
pp. 1
Isotopic Exchange of the Oxygen Heteroatom
pp. 1
3-Hydroxythiopyrylium Salts
pp. 1
By Condensation of 2-Methyl-4-1-benzoselenopyran-4-one with a Thiazolium Betaine
pp. 1
From Synthetic Equivalents of Pseudobases
pp. 1
Conversion of 2-1-Benzopyran-2-ones into 2-1-Benzopyran-2-thiones
pp. 1
Cyclization of 3-(Dialkylamino)-1-(2-hydroxyphenyl)prop-2-en-1-ones with Hydrogen Chloride
pp. 1
Aromatization of 1,2,3,4-Tetrahydro-6-dibenzo[,]pyran-6-ones with Palladium
pp. 1
From Diarylsulfanes and 1,1-Dichlorodimethyl Ether
pp. 1
Cyclization of 2-(Formylmethyl)benzamides
pp. 1
Friedel–Crafts Acylation of Dimethoxybenzenes with 2-Alkoxybenzoyl Halides with Concomitant Cyclization
pp. 1
By Formation of One C—C Bond
pp. 1
Oxidative Addition of Malonic Acid
pp. 1
Conversion of Bi-9-xanthen-9-ylidene Sulfide into 9-Xanthene-9-thione
pp. 1
Copper-Catalyzed Cyclization of 2-Bromobenzoates
pp. 1
Of Active Methylene Compounds to β-Substituted Acrylates
pp. 1
2-Selenopyran-2-ones from 2-Aminovinyl Selenoketones
pp. 1
Oxidation of 1-Benzylidene-1-2-benzopyrans
pp. 1
Reaction of 6-Sulfanylhexa-3,5-dien-2-ones in the Presence of Phosphoryl Chloride
pp. 1
Aldol Reaction and Isomerization
pp. 1
Pyrylocyanines by Condensation of 2/4-Methyl(ene)-Substituted Pyrylium Salts with Carbonyl Compounds or Orthoesters
pp. 1
Wittig Reaction of 2-Hydroxybenzaldehydes and 2-Hydroxyphenyl Ketones
pp. 1
Cyclization of 1-(2-Hydroxyphenyl)alkane-1,3-diones with Montmorillonite K 10
pp. 1
Cyclization of 1-(2-Hydroxyphenyl)prop-2-yn-1-ones
pp. 1
Elimination of Alcohols from 2-Alkoxy-2,3-dihydro-4-1-benzopyran-4-ones
pp. 1
Intramolecular Metal-Catalyzed Arylation
pp. 1
Using Cyclic Thiocarbonyl Compounds
pp. 1
1-Benzothiopyrylium Salts
pp. 1
Of Oxygen
pp. 1
Knoevenagel Condensation of 2-Hydroxybenzaldehydes with β-Oxo Esters
pp. 1
Formation of Pyrylium Salts by Condensation of 2/4-Methyl(ene) Groups with Carbonyl Compounds
pp. 1
Modification of Oxygen and Nitrogen Substituents
pp. 1
Transformations by Reaction with Activated Arenes, Arylethenes, or Hetarenes
pp. 1
With Formation of the 1—2 and 2—3 Bonds
pp. 1
From 4-Methylene-4-selenopyrans by Modification of Remote Functions
pp. 1
S-Acylation of Thiopyranthiones
pp. 1
Condensation of Methyl(ene) Groups with Other Electrophiles
pp. 1
Aromatization
pp. 1
Addition–Dehydroxylation of 2-1-Benzopyran-2-ones and 4-1-Benzopyran-4-ones Using Organometallic Compounds
pp. 1
Conversion of 9-Alkylidene-9-xanthenes into 9-Xanthene-9-thione
pp. 1
Synthesis by Ring-Closure Reactions
pp. 1
4-1-Benzopyran-4-thiones
pp. 1
From Methyl(ene) Ketones and 1,3-Dicarbonyl Compounds
pp. 1
Reaction with 1-Benzothiopyrylium Perchlorate
pp. 1
Dehydrogenation of Fused Hydrothiopyrans
pp. 1
Ring Closure of (2-Acylaryl)acetic Acid Derivatives
pp. 1
From 2-Hydroxy-2-1-benzothiopyrans
pp. 1
By Oxidative Dehydrogenation
pp. 1
By Hydrolysis and Decarboxylation
pp. 1
Protonation of Alkylidenethiopyrans and Their Derivatives
pp. 1
Benzotriazole-Mediated 4-Position Derivatization of 2,6-Diarylpyrylium Salts by Electrophiles
pp. 1
Oxidation with Cerium Reagents
pp. 1
From ,-Diethyl-2-methylbenzamide by Lithiation and Reaction with an -Alkyl Benzenecarbothioate
pp. 1
Cyclization of 2-Iodobenzoates with Alkynes
pp. 1
Cyclization of 3-(Dialkylamino)-1-(2-hydroxyphenyl)prop-2-en-1-ones
pp. 1
By Condensation of 2-Methylbenzotelluropyrylium Salts with Carbonyl Compounds
pp. 1
Sulfuric Acid Catalyzed Condensation of Phenols with 1,3-Dicarbonyl Compounds
pp. 1
Baeyer–Villiger Reaction of 9-Fluoren-9-one
pp. 1
Intramolecular Friedel–Crafts Acylation
pp. 1
By Photochemical Rearrangement of Phenyl Telluroesters
pp. 1
Synthesis by Ring-Closure Reactions
pp. 1
Reaction of Enamines with Aldehydes with Subsequent Oxidation
pp. 1
Montmorillonite K 10 and KSF as Condensing Agents
pp. 1
With Formation of the 8a—9 or 9—9a Bonds
pp. 1
By Annulation to an Arene
pp. 1
Reaction of 4-Thiopyran-4-ones with Grignard Reagents and Subsequent Elimination
pp. 1
Reactions of Enols and Enolates with Diketene and β-Oxo Esters
pp. 1
Reformatsky Reaction of 4-Thiopyran-4-ones
pp. 1
Reaction of 1,5-Diketones with Sulfur Transfer Reagents
pp. 1
Hydrolysis of 2-1-Benzopyran-2-imines
pp. 1
By Protonation of 4-1-Benzopyran-4-ones, 2-Alkylidene-2-1-benzopyrans, and 4-Alkylidene-4-1-benzopyrans
pp. 1
Condensation of 2-Hydroxyphenyl Ketones with Halo- or Arylacetyl Chlorides
pp. 1
Biaryl Ether Formation with Subsequent Intramolecular Friedel–Crafts Cyclization
pp. 1
Alkyl Substituents
pp. 1
Of Sulfur
pp. 1
Synthesis by Horner–Wittig Reaction
pp. 1
Trifluoroacetic Acid as Condensing Agent
pp. 1
With Formation of the 2—3 Bond
pp. 1
Condensation of Alkynes with Aldehydes
pp. 1
By Formation of One C—C Bond
pp. 1
Aromatization of 4-1-Benzopyran-4-ones by Addition of a Grignard Reagent and Dehydroxylation
pp. 1
Dehydrogenation of Tetrahydrothiopyran-4-ones
pp. 1
Preparation of a 10-Dibenzo[,]selenopyran-10-one Ylide
pp. 1
Palladium-Catalyzed Cyclization of 2-(Trifluoromethylsulfonyloxy)benzoates
pp. 1
Addition of Dihalogen to the Selenium Atom
pp. 1
Condensation of Methyl(ene) Ketones with Aldehydes by Dehydrocyclization
pp. 1
By Formation of Two Heteroatom—Carbon Bonds
pp. 1
2-Thiopyran-2-ones
pp. 1
By Formation of One Te—C Bond
pp. 1
Oxidative Cyclization of 1-(2-Hydroxyphenyl)prop-2-en-1-ones with Thallium(III) Salts
pp. 1
With Hydrogen Sulfide in the Presence of Hydride Acceptors
pp. 1
Cyclization of 1-(2-Hydroxyphenyl)prop-2-en-1-ones with Quinones
pp. 1
Dehydrogenation via an Intermediate Dihydrothiopyran-4-one
pp. 1
Addition of a Nucleophile to a 10-Dibenzo[,]pyran-10-one Followed by Dehydration
pp. 1
Ring Closure of 3-Aryl-1-(2-hydroxyaryl)prop-2-en-1-ones (2′-Hydroxychalcones) to Flavylium Salts
pp. 1
[C + C + C] Diacylation of Propene and Higher Alkenes
pp. 1
Addition of Hydrogen Sulfide under Basic Conditions
pp. 1
Of Hydrogen
pp. 1
2-1-Benzopyran-2-thiones
pp. 1
Cyclization of 1-(2-Hydroxyphenyl)prop-2-en-1-ones with Selenium Dioxide
pp. 1
With Formation of the 3—4 Bond
pp. 1
Oxidation of Dibenzotelluropyrans
pp. 1
By Annulation to an Arene
pp. 1
By Aromatization of Benzo- and Dibenzotelluropyrans
pp. 1
Ring Enlargement
pp. 1
Cyclization of Ester Enolates with Unsaturated Thiocarbonyl Compounds
pp. 1
Cyclization of 9,10-Dioxo-9,10-dihydroanthracene-1-acetates
pp. 1
From Methyl(ene) Ketones or Their Synthetic Equivalents and β-Oxo Aldehydes or Their Synthetic Equivalents
pp. 1
By Deacylation of 3-(Acyloxy)pyrylium or 3-(Acyloxy)thiopyrylium Salts
pp. 1
Acid-Catalyzed Condensation of Phenols and 1,3-Dicarbonyl Compounds (The Pechmann Reaction)
pp. 1
4-Selenopyran-4-ones by Oxidation of 1-Methyl-1λ-selenopyrans
pp. 1
Isotopic Exchange
pp. 1
Isomerization of 3-[(Arylamino)methylene]-2-1-benzopyran-2,4(3)-diones to 4-(Arylamino)-2-oxo-2-1-benzopyran-3-carbaldehydes
pp. 1
By Annulation to a Heterocycle
pp. 1
Cyclization of 2-(2-Bromovinyl)benzoates
pp. 1
Thermolysis of a 1,3-Dibromo-7,7-diphenylbicyclo[4.1.0]hept-3-ene-2,5-dione
pp. 1
Reduction of Carbonyl and Carboxy Functions
pp. 1
Oxidation of 2-1-Benzopyrans to 2-1-Benzopyran-2-ones
pp. 1
With Formation of the 1—8a Bond
pp. 1
Cyclization of Benzenethiols with 1,3-Diketones
pp. 1
Benzo- and Dibenzoselenopyranones
pp. 1
Knoevenagel Condensation of 2-Hydroxybenzaldehydes with Glycine and Glycolic Acid Derivatives
pp. 1
By Formation of One Heteroatom—Carbon Bond
pp. 1
By Formation of Two C—C Bonds
pp. 1
With Formation of the 3—4 or 5—6 Bonds
pp. 1
Cyclization of Polymer-Bound 3-(Dialkylamino)-1-[2-(-butyldimethylsiloxy)phenyl]prop-2-en-1-ones
pp. 1
Formation of Pyrylium Salts by Dehydrocyclizations of Penta-2,4-dien-1-ones and Analogous Compounds
pp. 1
By Autoxidation of a 9-Arylfluorene to a 9-Hydroperoxide Followed by Acid-Catalyzed Ring Expansion
pp. 1
Dehydrogenation of 3,4-Dihydro-2-1-benzopyran-2-ones with Palladium on Charcoal
pp. 1
By Formation of One O—C and One C—C Bond
pp. 1
Cyclization of 2-(2-Oxoethyl)benzoates
pp. 1
By Selenolactonization
pp. 1
From 4-Hydroxy-3,4-dihydro-1-2-benzothiopyrans
pp. 1
With Formation of the 4a—5 and 8—8a Bonds
pp. 1
By Photochemical Rearrangement
pp. 1
[4 + 2] Cycloaddition Reactions
pp. 1
By Reaction of Pyranones with C-Nucleophiles, Followed by Dehydration
pp. 1
6-Dibenzo[,]pyran-6-ones
pp. 1
By Formation of Two C—C Bonds
pp. 1
Reaction of an Activated Phenol with a 2-Hydroxybenzaldehyde
pp. 1
Conversion of 9-Xanthen-9-ones into 9-Xanthene-9-thiones
pp. 1
Aromatization by O-Alkylation or Protonation
pp. 1
Acid-Catalyzed Rearrangement of 3-(1-Hydroxyalkyl)-3-benzo[]furan-1-ones
pp. 1
Telluration of (2,6-Di--butyl-4-oxo-4-telluropyran-3-yl)lithium
pp. 1
Substitution of Halogen by Oxygen, Sulfur, and Nitrogen Groups
pp. 1
Introduction of C10 with Trifluoroacetic Anhydride
pp. 1
By Elimination of -Methyltoluenesulfonamide from Arylsulfonylselenimines
pp. 1
Friedel–Crafts Reaction of Diphenyl Ethers
pp. 1
Reactions of 2-1-Benzopyran-2,7,8-triones and 2-1-Benzopyran-2,7,8-trione 7-(-Methyloximes)
pp. 1
4-Pyran-4-thiones
pp. 1
Cycloreversion
pp. 1
With an ω-Substituted or Cyclic Acetophenone
pp. 1
Cyclization of 1,3,5-Triketones
pp. 1
Direct Thionation of 2-1-Benzopyran-2-ones with Lawesson's Reagent
pp. 1
Reductive Lactonization of Naphthoquinones
pp. 1
By Addition of Grignard Reagents to 1-2-Benzopyran-1-ones (Isocoumarins)
pp. 1
Cyclization of 2-Alk-1-ynylbenzoic Acids
pp. 1
Cyclization of 1-(2-Hydroxyphenyl)alkane-1,3-diones with Sulfonic Acid Resins
pp. 1
By Double Elimination from 2,4-Diethoxy-3,4-dihydro-2-1-benzopyrans
pp. 1
2-Telluropyran-2-ones and 4-Telluropyran-4-ones
pp. 1
Condensation of Phenols with 3-Haloacrylic Acid Derivatives
pp. 1
By Aromatic Electrophilic Substitution
pp. 1
Nucleophilic Addition of a Trialkyl Phosphite and Reoxidation
pp. 1
Condensation of a 2-Sulfanylbenzoate Ester with a Penta-2,3-dienedioate
pp. 1
Dibenzo[,]pyrylium Salts (Xanthylium Salts)
pp. 1
From Alkynes and α,β-Unsaturated Ketones
pp. 1
2-Benzopyrylium Salts
pp. 1
Cleavage of 1-(2,2-Dimethyl-4,6-dioxo-1,3-dioxan-5-ylidene)-3-phenyl-1-2-benzothiopyran
pp. 1
Reaction of 2-Iodophenols with Alkynes or Allenes and Carbon Monoxide
pp. 1
Aromatization of 2,3-Dihydro-4-1-benzopyran-4-ones with Quinones
pp. 1
By Formation of One O—C and Two C—C Bonds
pp. 1
Aromatization Combined with Substitution
pp. 1
Substitution of Halogen with C-Nucleophiles
pp. 1
Synthesis by [4 + 2] Cycloaddition
pp. 1
Anion Exchange in Pyrylium Salts
pp. 1
Photochemical Rearrangement of 2-Styryl-4-1-benzopyran-4-ones
pp. 1
Addition of an Activated Arene or Alkene Followed by Reoxidation or Disproportionation
pp. 1
Cyclization of 2,3,4,5-Tetrachloro-5-(methylsulfanyl)penta-2,4-dienoyl Chloride
pp. 1
Synthesis by Ring Transformation
pp. 1
Conversion of 9-(Trimethylsilyl)-9-Xanthene into a 9-Xanthene-9-thione -Imide
pp. 1
By Formation of One S—C Bond
pp. 1
Phosphoric Acid and Phosphorus Pentoxide Catalyzed Condensation of Phenols with 1,3-Dicarbonyl Compounds
pp. 1
From 4-Bromo-3,4-dihydro-1-2-benzothiopyran-1-ones by Elimination
pp. 1
Cyclization of 1-(2-Hydroxyphenyl)alkane-1,3-diones with Sulfuric Acid
pp. 1
Reaction of Tetrahydro-4-thiopyran-4-ones with Grignard Reagents and Subsequent Dehydration–Dehydrogenation
pp. 1
Hydrogen Chloride or Fluoride as Condensing Agents
pp. 1
Reaction of Enolates with Acetoacetates
pp. 1
Halolactonization
pp. 1
Alkylation of Xanthylium Salts in the Pyrylium Ring
pp. 1
Acid-Catalyzed Rearrangement of Dibenz[,]azocine-6,12-diones
pp. 1
Of Heteroatoms
pp. 1
Dehydrogenation of Dihydrothiopyranones
pp. 1
Conversion of 4-1-Benzopyran-4-thiones into 4-1-Benzopyran-4-ones
pp. 1
Photochemical Cyclization of 3-(2-Methylbenzoyl)-4-1-benzopyran-4-one
pp. 1
Oxidation of 2-1-Benzopyran-2-thiones with 3-Chloroperoxybenzoic Acid
pp. 1
Addition Reactions
pp. 1
Cyclization of 2-Acyloxyphenyl Ketones by Intramolecular Wittig Reaction
pp. 1
Phosphoryl Chloride as Condensing Agent
pp. 1
By Formation of Two C—C Bonds
pp. 1
Reaction of Polyfluoroalkyl Phenyl Ketones with Sodium Sulfide
pp. 1
Transformation of 4-1-Benzopyran-4-ones by Reaction with ,-Dimethylacetamide
pp. 1
By Alkylation of Pyranones or Pyranthiones
pp. 1
Reaction of a Phenol with a 2-(Ethoxymethylene)-3-oxocarboxylic Ester
pp. 1
Electrophilic Alkylation of 4-Hydroxy-2-1-benzoselenopyran-2-one
pp. 1
Direct Conversion of 4-1-Benzopyran-4-ones into 4-1-Benzopyran-4-thiones
pp. 1
With a 3-Oxoalkanoic Ester
pp. 1
Oxidation of Dibenzoselenopyrylium Salts
pp. 1
Indirect Conversion via Imines
pp. 1
Intramolecular Friedel–Crafts Reaction of 3-Benzyl-4-oxo-4-1-benzopyran-2-carboxylic Acid
pp. 1
2-Pyran-2-thiones
pp. 1
Cyclization of 2-(Phenylethynyl)benzonitrile
pp. 1
Triacylation of Alkenes
pp. 1
4-Pyran-4-ones
pp. 1
Applications of Product Subclass 2 in Organic Synthesis
pp. 1
Modification of Pyrylium Salts by Metalation of 2/4-Methyl Groups
pp. 1
Alkylation
pp. 1
Aromatization of 2,3-Dihydro-4-1-benzopyran-4-ones Using Thallium(III) Salts and Hypervalent Iodine Reagents
pp. 1
Oxidation Using the Nitronium Ion
pp. 1
Aromatization of 1,2,3,4-Tetrahydro-6-dibenzo[,]pyran-6-ones by Additional Methods
pp. 1
Lactonization of 2-(2′-Hydroxy-2-bisphenyl)-4,5-dihydrooxazoles
pp. 1
By Cyclization of Ethynyl 2-(Methylselanyl)phenyl Ketones
pp. 1
By Formation of One Heteroatom—Carbon and Two C—C Bonds
pp. 1
Addition of Enolates and Enols to Enamino Esters, Enamino Ketones, and Related Compounds
pp. 1
By Dehydration of 4-Hydroxyselenopyrans
pp. 1
2,4,6-Triarylpyrylium Perchlorates from 1,3-Diarylpropane-1,3-diones by Cleavage of an Aroyl Group
pp. 1
Lactonization of Hydroxy Esters
pp. 1
Synthesis by Ring-Closure Reactions
pp. 1
Cyclization Using Palladium Catalysis
pp. 1
Base-Catalyzed Cyclization of ,-Dialkyl-2-phenoxybenzamides
pp. 1
Reaction of 2-Acylketene Dithioacetals with Aryl Isothiocyanates
pp. 1
Thiation
pp. 1
Aryl Coupling Reactions
pp. 1
Cyclization of a 2-Propanoylphenyl ,-Dialkylcarbamate
pp. 1
Condensation of 4-Methyl-2-oxo-2-1-benzopyran-3-carbonitrile with Malononitrile and Aldehydes
pp. 1
Applications of Product Class 5 in Organic Synthesis
pp. 1
With Formation of the 1—2 and 3—4 Bonds
pp. 1
Pyrolysis of Phenyl 2-Hydroxybenzoate
pp. 1
Condensation of 2-Hydroxyphenyl Ketones with Acyl Chlorides
pp. 1
From Diaryl Ketones by Reaction with Methanethiol Under Basic Conditions
pp. 1
Use of a Reagent Providing C10 of the Dibenzo[,]pyrylium Salt
pp. 1
Cyclization of 2-(2-Oxoethyl)benzoic Acids
pp. 1
Lactonization of 3-(2-Hydroxyphenyl)-3-oxopropanamides
pp. 1
Cyclization Using Mercury Salts
pp. 1
Dehydrogenation of 5,6-Dihydro-2-1-benzopyran-2-ones with Quinones
pp. 1
Palladium-Catalyzed Cyclization of 2-Iodobenzoates
pp. 1
By Modification of Carbon Functionalities
pp. 1
By Formation of One Heteroatom—Carbon and One C—C Bond
pp. 1
Synthesis by Ring-Closure Reactions
pp. 1
Reaction of 3-Aryl-3-chloroprop-2-eniminium Salts with Thioacetamides
pp. 1
From α-Oxoketene Dithioacetals and Related Compounds
pp. 1
By Formation of Two S—C Bonds
pp. 1
Cyclization of 2-Acyloxyphenyl Ketones with Organic Bases
pp. 1
Replacement of Halogen by Amines
pp. 1
Cyclization of Substituted -Aryl Prop-2-enethioate Esters
pp. 1
By Formation of One S—C Bond
pp. 1
Reaction of 2-Hydroxybenzaldehyde Imines and Oximes and 2-Hydroxybenzamides with Carbon Suboxide
pp. 1
By Addition of Sodium/Lithium Telluride to Diethynyl Ketones
pp. 1
Aromatization
pp. 1
By Alkylation of Benzotelluropyran-4-ones
pp. 1
By Dehydrogenation
pp. 1
Of Heteroatoms
pp. 1
With Acetophenones
pp. 1
By Condensation of 4-Alkyl-1-benzoselenopyrylium Salts with Thiazolium Betaines
pp. 1
Oxidation of 1,2,3,4-Tetrahydro-9-xanthen-9-ones Using Sulfur
pp. 1
Aromatization of 10-Dibenzo[,]pyran-10-ones
pp. 1
Other Eliminations
pp. 1
With Retention of Ring Size
pp. 1
Deuteration
pp. 1
Elimination of Hydrogen Bromide
pp. 1
Cyclization of 3-(2-Sulfanylphenyl)prop-2-enoic Acids
pp. 1
By Lactonization
pp. 1
Cyclization of 3-(2-Sulfanylphenyl)prop-2-enoate Esters and Related Compounds
pp. 1
Modification of Carbon Substituents
pp. 1
Hydrolysis of 2-(Dialkylamino)-4-1-benzopyran-4-ones
pp. 1
Aromatization of 2-Hydroxy-2-benzopyrans by Protonation Combined with Dehydration
pp. 1
Reaction of Enamines with Acyl Chlorides
pp. 1
O-Alkylation of 4-Thiopyran-4-ones
pp. 1
Synthesis of 9-Xanthene-9-thiones from 9-Xanthen-9-ones via 9,9-Dichloro-9-xanthenes
pp. 1
Aromatization of a 10-Alkylidene-10-dibenzo[,]pyran by Protonation
pp. 1
By Formation of One C—C Bond
pp. 1
By Formation of One O—C and One C—C Bond
pp. 1
By Hydrolysis of 4-Methylenetelluropyrans
pp. 1
Oxidation of 9-Xanthenes to 9-Xanthen-9-ones
pp. 1
4-1-Benzotelluropyran-4-ones by Cyclization of Benzenetellurenyl Bromides
pp. 1
[C + C + C] Condensation of Methyl(ene) Ketones or Their Equivalents with Carboxylic Acid Derivatives
pp. 1
4-Selenopyran-4-thiones from 4-Selenopyran-4-ones
pp. 1
By Oxidative Fragmentation of 1-2-Benzopyrans (Isochromans)
pp. 1
Ring Closure of Bis(2-alkoxyphenyl)methanones
pp. 1
Cyclization of 2-(Formylmethyl)benzoic Acids
pp. 1
From 6-Dibenzo[,]thiopyrans with Triphenylcarbenium Perchlorate
pp. 1
Condensation of 2-Hydroxyphenyl Ketones with Carboxylic Esters
pp. 1
Reaction of a Phenol with a 1,3-Dioxo Compound
pp. 1
Condensation of a 2-Sulfanylbenzoate Derivative with a Benzyne
pp. 1
Substitution of Metals
pp. 1
Palladium-Catalyzed Coupling of Phenols with Alkynoates and Alkynoic Acids
pp. 1
Copper(II)-Catalyzed Cyclization of 2-Phenoxybenzaldehydes
pp. 1
Knoevenagel Condensation of 2-Hydroxybenzaldehydes with Malonic Acid and Its Derivatives
pp. 1
Synthesis by Substituent Modification
pp. 1
Applications of Product Subclass 1 in Organic Synthesis
pp. 1
O-Functionalization and Substitution of 2-Thiopyran-2-ones with Oxalyl Halides or Phosphorus Pentachloride
pp. 1
Synthesis by Substituent Modification
pp. 1
From 2-Benzoyl- or 2-Acetylbenzoates with Trimethylsulfoxonium Ylide
pp. 1
Reaction of Bis-hetaryl Sulfides with Dichloromethyl Methyl Ether
pp. 1
Disproportionation of 2- or 4-Thiopyrans or Dihydrothiopyrans
pp. 1
Formal Exchange of Ring Members with Retention of Ring Size
pp. 1
Condensation of 2-Hydroxyphenyl Ketones with Carbon Disulfide
pp. 1
Synthesis by Substituent Modification
pp. 1
Rearrangement of 2-Pyran-2-thiones
pp. 1
Cyclization of Derivatives of 2-(Formylmethyl)- and 2-(2-Oxoethyl)benzoic Acids
pp. 1
From 3,5-Dioxo Esters
pp. 1
Formation of Pyrylium Salts by Hydride Abstraction from a 4-Pyran
pp. 1
Synthesis of 2-1-Benzothiopyran-2-thiones by Reaction of 2-1-Benzothiopyran-2-ones with Phosphorus Pentasulfide
pp. 1
Other Phosphoric Acid Derivatives as Condensing Agents
pp. 1
Sulfuric Acid Catalyzed Intramolecular Friedel–Crafts Acylation of 2-Phenoxybenzoic Acids
pp. 1
From α,β- or β,γ-Unsaturated Ketones and Carboxylic Acid Derivatives
pp. 1
By Ring Closure and Aryl Migration of [2-(Diarylmethyl)phenyl]acetic Acids
pp. 1
By N-Protonation or N-Alkylation
pp. 1
[C + C] Condensation of Methyl(ene) Ketones or Their Synthetic Equivalents with 1,3-Dicarbonyl Compounds, α,β-Unsaturated Oxo Compounds, or Their Synthetic Equivalents
pp. 1
By Oxidation of Thiabenzenes with Molecular Oxygen
pp. 1
Base-Catalyzed Lactonization of 3-(2-Hydroxyphenyl)propanoates or -acrylates
pp. 1
Reduction–Dehydration of 1-Benzothiopyran-4(4)-ones
pp. 1
From a (Cyanomethyl)arene with Carboxylic Acid Derivatives (as C1 Component)
pp. 1
By Formation of One Heteroatom—Carbon Bond
pp. 1
Synthesis from Condensed Benzopyrylium Salts
pp. 1
Dehydrogenation with Oxidizing Agents
pp. 1
Reaction of a Phenol with an Ethynyl Ketone
pp. 1
Diacylation of Aryl-Substituted Alkenes
pp. 1
Reaction with C-Nucleophiles
pp. 1
Reaction of 3-Aminoprop-2-enethiones with -(1-Chloroalkylidene)formamidinium Perchlorates
pp. 1
By Condensation of 4-Alkyl-1-benzoselenopyrylium Salts with Ethyl -Phenylformimidate
pp. 1
Cyclization of Benzyl 3-(2-Halophenyl)acrylates
pp. 1
2-1-Benzopyran-2-ones
pp. 1
Base-Catalyzed Addition of 3-(Phenylsulfanyl)benzo[]furan-1(3)-one to 2-1-Benzopyran-2-one
pp. 1
Cyclization of 1-(2-Hydroxyphenyl)- and 1-(2-Alkoxyphenyl)alkane-1,3-diones
pp. 1
O-Functionalization and Substitution of 4-Thiopyran-4-ones with Chlorosulfonyl Isocyanate
pp. 1
Reaction of Methyl Ketones with Triethyl Orthoformate and Hydrogen Sulfide
pp. 1
By Reaction of 1,5-Diketones with Hydrogen Selenide
pp. 1
Conversion of 6-Dibenzo[,]pyran-6-ones into 6-Dibenzo[,]pyran-6-thiones with Lawesson's Reagent
pp. 1
Lactonization of 3-(2-Hydroxyphenyl)propanoates or -acrylates
pp. 1
Base-Catalyzed Reaction of 2-Hydroxyphenyl Ketones with Alkyl Chloroformates
pp. 1
Transformation of a 10-Dibenzo[,]pyran-10-one by Protonation Followed by Dehydration with Trifluoromethanesulfonic Anhydride
pp. 1
From Arylacetones with an Aromatic Acid Chloride and Aluminum Trichloride
pp. 1
Oxidative Cleavage of 4,4′-Bi-4-1-benzopyranylidenes to 4-1-Benzopyran-4-ones
pp. 1
Synthesis by Ring-Closure Reactions
pp. 1
Thermal Condensation of Phenols with 1,3-Dicarbonyl Compounds
pp. 1
Ring Closure of a 1,3-Diarylprop-2-en-1-one
pp. 1
Via Stable Pseudobases
pp. 1
From 6-Dibenzo[,]thiopyran 5-Oxides with Perchloric Acid
pp. 1
Cyclization Using Palladium Catalysts
pp. 1
By Reduction or Grignard Addition and Dehydration
pp. 1
Cyclization of 1-(2-Hydroxyphenyl)prop-2-en-1-ones
pp. 1
From 10-Hydroxy-10-dibenzo[,]thiopyrans
pp. 1
Reaction of Enamines with Mixed Anhydrides
pp. 1
Oxidative Rearrangement of 2-Monosubstituted and 2,2-Disubstituted 2,3-Dihydro-4-benzopyran-4-ones
pp. 1
Neutral or Thermal Lactonization of 3-(2-Alkoxyphenyl)acrylates, with Concomitant Claisen Rearrangement
pp. 1
Aromatization
pp. 1
Condensation of (Aminocarbonyl)acetic Acid Esters with Phenols
pp. 1
Reaction of a 2-Acylphenol (2-Hydroxyacetophenone or 2-Hydroxybenzophenone) with a Compound Contributing One Carbon Atom to the Pyrylium Ring
pp. 1
By Reaction with Fluorides
pp. 1
By O- or S-Functionalization and Substitution
pp. 1
By Formation of One Heteroatom—Carbon Bond
pp. 1
By O-Functionalization
pp. 1
Isotopic Exchange of Side-chain α- and γ- ("Benzylic") Hydrogen Atoms
pp. 1
Preparation of 10-Dibenzo[,]telluropyran-10-one from a Bis-diazonium Salt
pp. 1
By Condensation of 10-Dibenzo[,]selenopyran-10-ylideneacetaldehyde with Active Methyl Compounds
pp. 1
Reactions of 3-Diazo-2-1-benzopyran-2,4(3)-diones
pp. 1
Oxidation and Hydrolysis of 1-Benzopyrylium Salts to 4-1-Benzopyran-4-ones
pp. 1
In Situ Generation of the 3-Oxidopyrylium Salt from a 6-(Acyloxy)-2-pyran-3(6)-one
pp. 1
Dehydrogenation of 4-Thiopyrans
pp. 1
Synthesis by Ring Transformation
pp. 1
By Formation of Two Se—C Bonds
pp. 1
Condensation of Methyl Groups with Electrophiles
pp. 1
Cycloaddition of 3,3-Dialkyl-3,4-dihydro-9-xanthen-9-ones with Dimethyl Acetylenedicarboxylate
pp. 1
By Ring Contraction
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H. J. Chaudhary
,
C. A. DAMALAS
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