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 doubleC–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