Use as a intermediate field of the alkyl ester of 3- (3,4- jiharohueniru) -2,6- jiokisopiperijin -3- propionic acid

摘要

(57) Abstract This invention, the low-grade alkyl ester formula (i) and, that regards pure isomer optically. Latter, whether enanchio selective enzyme hydrolysis, either of the cyclization of the chemical compound formula (vi) is obtained by. Conversion 1