Synthesis and biological activity of 23-ethylidene-26-hydroxy-22-oxocholestane derivatives from spirostanic sapogenins
作者:José Oscar H. Pérez-Díaz、Lucie Rárová、J. Paul Muñoz Ocampo、Nancy E. Magaña-Vergara、Norberto Farfán、Miroslav Strnad、Rosa Santillan
DOI:10.1016/j.ejmech.2012.02.020
日期:2012.5
and biological evaluation of three new cholestane frameworks of the type: (25R)-3β,16β-Diacetoxy-23-ethylidene-26-hydroxy-22-oxocholestane, starting from spirostanic sapogenins of the 25R series, is described. The compounds were obtained by the reductive cleavage of the F ring of 22-oxo-231,26-epoxycholestane derivatives using 9-BBN. These modified derivatives exhibit cytotoxic activity against CEM