7-ethoxycarbonylmethyl-4,10-bis-[((S)-1-phenyl-ethylcarbamoyl)-methyl]-1,4,7,10-tetraaza-cyclododecane-1-carboxylic acid tert-butyl ester 在
lithium hydroxide 作用下,
以
甲醇 为溶剂,
反应 12.0h,
以98%的产率得到7-carboxymethyl-4,10-bis-[((S)-1-phenyl-ethylcarbamoyl)-methyl]-1,4,7,10-tetraaza-cyclododecane-1-carboxylic acid tert-butyl ester