The oxidation of Δ2, Δ2,4 and Δ4,6 steroids with RuO4
作者:Domenica Musumeci、Giovanni N Roviello、Donato Sica
DOI:10.1016/j.steroids.2003.11.003
日期:2004.3
In order to find new ways for the functionalization of the A and B rings of the steroid nucleus, the reaction of 5alpha-androst-2-en-17beta-ol 17-acetate (1), cholesta-2,4-diene (4) and cholesta-4,6-dien-3beta-ol 3-acetate (7) was examined using stoichiometric amounts of ruthenium tetraoxide to yield 1,2-cis diols and/or alpha-hydroxy ketones. The reaction of 5alpha-cholest-2-en-3-ol 3-acetate (9) with ruthenium tetraoxide was also carried out and afforded, apart from an alpha-hydroxy ketone, also a diketone and a seco-dicarboxylic acid. The structures of all new steroids, including stereochemical details, were deduced by analysis of spectral data. (C) 2004 Elsevier Inc. All rights reserved.
Migration reversible du methyle 19 en serie cholestane