Pyridine-Catalyzed Double C-N Coupling Reaction of an Isocyanate with Two Benzynes
作者:Yi-Hsien Lee、Yen-Chung Chen、Jen-Chieh Hsieh
DOI:10.1002/ejoc.201101251
日期:2012.1
A pyridine-catalyzed double C–N bond cross-coupling reaction involving two benzynes with an isocyanate was carried out. The coupling reaction proceeded through a unique pathway involving the formation of an unstable carbamic acid intermediate and facile decarboxylation. Subsequent nucleophilic addition/protonation of in situ prepared amines with benzynes afforded variously substituted diaryl- and triarylamines
进行了吡啶催化的双 C-N 键交叉偶联反应,涉及两个苄与异氰酸酯。偶联反应通过一条独特的途径进行,包括不稳定氨基甲酸中间体的形成和脱羧反应。随后用苄对原位制备的胺进行亲核加成/质子化,以中等至良好的产率提供各种取代的二芳基胺和三芳基胺,并具有多种官能团的耐受性。