Furan Ring-Opening/Indole Ring-Closure: Pictet-Spengler-Like Reaction of 2-(<i>o</i>-Aminophenyl)furans with Aldehydes
作者:Alexander V. Butin、Maxim G. Uchuskin、Arkady S. Pilipenko、Fatima A. Tsiunchik、Dmitry A. Cheshkov、Igor V. Trushkov
DOI:10.1002/ejoc.200901241
日期:2010.2
new simple approach to 3-(2-acylvinyl)-2-(hetero)aryl-indoles has been developed. The method is based on the acid-catalysed interaction of 2-(2-aminophenyl)furans with (hetero)aromatic aldehydes. The reactions proceed under very mild conditions and lead to indoles containing a reactive α,β-unsaturated ketone moiety, which is suitable for further transformations, in moderate to good yields.