A process for inversion of the stereo configuration of (R)-(+)-3,4-dihydro-6-hydroxy-2,5,7,8-tetraalkyl-2H-1-benzopyran-2-carboxy lic acid and derivatives thereof to form the corresponding S-(-) acid and intermediates in this process.
一种用于将(R)-(+)-3,4-二氢-6-羟基-2,5,7,8-四烷基-2H-1-苯并
吡喃-2-
羧酸及其衍
生物的立体构型反转为相应的S-(-)酸的过程,以及这个过程中的中间体。