Diazo Compounds: Versatile Synthons for the Synthesis of Nitrogen Heterocycles via Transition Metal-Catalyzed Cascade C-H Activation/Carbene Insertion/Annulation Reactions
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A general rhodium-catalyzed oxidative coupling reaction between internal alkynes and aryl aldimines is described. This process affords 3,4-disubstituted isoquinolines in good yield and high regioselectivity. Preliminary mechanistic studies suggest that the C-N bond formation arises from the reductive elimination of a rhodium(III) species.
[1
]Key Laboratory of Small Functional Organic Molecule, Ministry of Education and Jiangxi's
Key Laboratory of Green Chemistry; Jiangxi Normal University; Nanchang, Jiangxi 330022
People's Republic of China