Enantioselective synthesis of α-hydroxylated enterolactone and analogs
作者:Michael Sefkow、Alexandra Kelling、Uwe Schilde
DOI:10.1016/s0040-4039(01)00907-8
日期:2001.7
A short and general synthesis of enantiomericallypure α-hydroxylated lactone lignans starting from commercially available iPr malate is presented. Key reactions are two stereoselective alkylations of malic acid derivatives. Some enhancements of the alkylation of malic acid esters and a general extension of the alkylation of dioxolanones is reported. Proof of the stereochemical outcome of the alkylation