Synthesis of Novel 5α,9α-Bridged Steroids by a Boron Trifluoride−Diethyl Ether Induced Rearrangement
作者:Lidija Bondarenko、Ljubinka Lorenc、Dieter Bläser、Roland Boese
DOI:10.1002/ejoc.200400117
日期:2004.8
A stereoselective and synthetically useful rearrangement reaction of 5α,8α-bridged 9,11α-epoxy steroids induced by boron trifluoride−diethyl ether is presented, in the preparation of a new class of 5α,9α-bridged 11α-hydroxy steroid derivatives in high yields. Lactones were prepared from several of the rearranged 11α-hydroxy compounds. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)
提出了一种由三氟化硼-乙醚诱导的 5α,8α-桥连 9,11α-环氧类固醇的立体选择性和合成有用的重排反应,以高产率制备一类新的 5α,9α-桥连 11α-羟基类固醇衍生物. 内酯是由几个重排的 11α-羟基化合物制备的。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)