Add time:08/10/2019 Source:sciencedirect.com
The reduction of 16-hydroxymethylene-3-methoxy-13α-estra-1,3,5(10)-trien-17-one (14) and 16-hydroxymethylene-3-benzyloxy-13α-estra-1,3,5(10)-trien-17-one (16) yielded a mixture of two diastereomeric diols, the 16α-hydroxymethyl,17β-hydroxy and 16β-hydroxymethyl,17α-hydroxy isomers (17a-20a) in a ratio of 6:1. We describe a straightforward synthetic route to transform the isomers with trans functional groups attached to ring D (17a-20a) into isomers with cis functional groups (25a-28a).We determined the in vitro antiproliferative activities of compounds 17a–20a and 25a–28a by means of MTT assays against a panel of human adherent cancer cell lines HeLa, A2780, MCF-7, T47D, MDA-MB-231 and MDA-MB-361.
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