In the presence of catalytic amount of indium(III) Lewis acids, the four component reaction of aldehydes, isocyanides, trimethylsilyl azide and aliphatic alcohols smoothly proceeded to give alkoxylated 1H-tetrazole products in good yields. In particular, In(OTf)(3) and In(ONf)(3) showed notably high level of catalytic activity in this reaction. (C) 2012 Elsevier Ltd. All rights reserved.
Direct Alkylative Passerini Reaction of Aldehydes, Isocyanides, and Free Aliphatic Alcohols Catalyzed by Indium(III) Triflate
作者:Hikaru Yanai、Tomoko Oguchi、Takeo Taguchi
DOI:10.1021/jo900354e
日期:2009.5.15
In(OTf)3 was found to be a useful Lewis acid catalyst for direct alkylative Passerinireaction of aldehydes, isocyanides, and free aliphatic alcohols. In the present reaction, aromatic and α,β-unsaturated aldehydes performed as nice substrates to give the corresponding α-alkoxy amide products in good yield.