Practical Synthesis of Chiral Synthons for the Preparation of HMG-CoA Reductase Inhibitors
作者:Toshiro Konoike、Yoshitaka Araki
DOI:10.1021/jo00104a049
日期:1994.12
A practical procedure for the enantioselective preparation of optically pure (R)- and (S)-monomethyl esters of 3-[(tert-butyldimethylsilyl)oxy]pentanedioic acid has been developed by diastereoselective ring-opening of 3-[(tert-butyldimethylsilyl)oxy]pentanedioic anhydride 5 by benzyl (R)- and (S)-mandelate, respectively. These half-esters afforded chiral Wittig reagent 2 and Horner-Wadsworth-Emmons (HWE) reagent 1 efficiently which have been proved to be useful in the synthesis of HMG-CoA reductase inhibitors. The method is applied to the synthesis of the (R)-3-methylglutaric acid, monomethyl ester.