Synthesis of 2-benzoyl-4-(2-hydroxybenzoyl)phenols by catalytic domino 'Michael-retro-Michael-Mukaiyama-aldol' reactions of 1-aryl-1,3-bis(silyloxy)buta-1,3-dienes with 3-formylchromones

摘要

The domino reaction of 1-aryl-1,3-bis(silyloxy)buta-1,3-dienes with 3-formylbenzopyrylium triflates, in situ generated from 3-formylchromones, afforded a variety of 2-benzoyl-4-(2-hydroxybenzoyl)phenols. (c) 2007 Elsevier Ltd. All rights reserved.