(3R,6S,8aR)-3-(1H-Indol-3-ylmethyl)-4-oxo-hexahydro-pyrrolo[1,2-a]pyrazine-2,6-dicarboxylic acid 2-tert-butyl ester 6-methyl ester 在
lithium hydroxide 作用下,
以
四氢呋喃 为溶剂,
生成 (3R,6R,9S)-2-(3-indolylmethyl)-4-(tert-butoxycarbonyl)-1,4-diaza-2-oxobicyclo<4.3.0>nonane-9-carboxylic acid