A Powerful <i>o</i>-Quinone Dimethide Strategy for Intermolecular Diels−Alder Cycloadditions
作者:John G. Allen、Martin F. Hentemann、Samuel J. Danishefsky
DOI:10.1021/ja993627u
日期:2000.2.1
Conrotatory thermal fragmentation of trans-1,2-disilyloxybenzocyclobutenes generates o-quinonedimethides at remarkably low temperatures. Smooth stereoselective Diels−Alder cycloaddition with a range of dienophiles provides hydronaphthalene derivatives in excellent yield. Direct oxidative desilylation of the adducts affords the corresponding naphthoquinones. Substitution of the benzene nucleus with