3,6-Dioxo-1,4-cyclohexadien-1-yl-butandate esters

摘要

{PG,1 A process for inversion of the stereo configuration of (R)-({30 )-3,4-dihydro-6-hydroxy-2,5,7,8-tetraalkyl-2H-1-benzopyran-2-carboxylic acid and derivatives thereof to form the corresponding S-({31 ) acid and intermediates in this process.