Cycloaddition of annulated cyclohexa-2,4-dienones and novel reduction of halogen at bridgehead: an expedient route to tetracyclo[6.5.2.02,7.09,13]pentadec-2(7),11-dien-14-one and framework of conidiogenol and conidiogenone
摘要:
An expedient route to tetracyclo[6.5.2.0(2,7).0(9,13)]pentadec-2(7),11-dien-14-one and tetracyclic framework of conidiogenol have been reported. Cycloaddition of annulated cyclohexa-2,4-dienone with cyclopentadiene, photochemical oxa-di-pi-methane reaction and a highly unusual dehalogenation of bridgehead halogen are the key features of our methodology. (C) 2009 Elsevier Ltd. All rights reserved.