Lewis acid-catalyzed formation of Ugi four-component reaction product from Passerini three-component reaction system without an added amine
作者:Wei-Min Dai、Huoming Li
DOI:10.1016/j.tet.2007.10.050
日期:2007.12
In the presence of a Lewis acid the phenol-Passerini three-component reaction (phenol-P-3CR) system is found to deliver a product of the phenol-Ugi four-componentreaction (phenol-U-4CR). It is the first demonstration of an isocyanide as an amine equivalent in isocyanide-based multicomponent reactions (IMCRs). In general, by using Ti(O-i-Pr)4 in MeOH both phenol-U-4CR and U-4CR products are synthesized