Acetic acid 5-acetoxy-2-((S)-2-tert-butoxycarbonylamino-2-{(R)-1-[(N'-phenyl-hydrazinocarbonylmethyl)-carbamoyl]-ethylcarbamoyl}-ethyl)-phenyl ester 在
肼 作用下,
以
甲醇 为溶剂,
反应 168.0h,
以50%的产率得到((S)-2-(2,4-Dihydroxy-phenyl)-1-{(R)-1-[(N'-phenyl-hydrazinocarbonylmethyl)-carbamoyl]-ethylcarbamoyl}-ethyl)-carbamic acid tert-butyl ester