Efficient trans-diaxial hydroxylation of Δ5-steroids
摘要:
A convenient, fast, and high-yielding process to synthesize 5 alpha,6 beta-dihydroxysteroids directly from the correspondent Delta(5)-steroids is reported. The reaction protocol consists in the conjugation of a readily available and stable oxidant, magnesium bis(monoperoxyphthalate) hexahydrate, with the non-toxic bismuth(III) triflate in acetone to afford the trans-diaxial hydroxylation product in a stepwise manner and in excellent yields. (C) 2010 Elsevier Ltd. All rights reserved.