(11S,11aS)-10-allyloxycarbonyl-7,8-dimethoxy-11-hydroxy-2-(methoxycarbonylmethyl)-1,10,11,11a-tetrahydro-5H-pyrrolo[2,1-c][1,4]benzodiazepin-5-one 在
lithium hydroxide 作用下,
以
甲醇 为溶剂,
以89%的产率得到(11S,11aS)-2-Carboxymethyl-11-hydroxy-7,8-dimethoxy-5-oxo-11,11a-dihydro-1H,5H-benzo[e]pyrrolo[1,2-a][1,4]diazepine-10-carboxylic acid allyl ester