Ethyl (2S,3S)-2-[N-{(1R,2R,4E)-5-(2-benzoxazolyl)-1-methyl-2-(3,4-methylenedioxyphenyl)-4-pentenyl}-N-(2-naphthylmethyl)carbamoyl]-5-oxotetrahydrofuran-3-carboxylate 、
sodium hydroxide 在
silica gel 、
chloroform methanol 作用下,
以
四氢呋喃 、
水 为溶剂,
反应 16.0h,
以to obtain 33.0 mg (yield: 26%) of the above-identified compound as a colorless foam的产率得到Sodium (3S,4S)-4-[N-{(1R,2R,4E)-5-(2-benzoxazolyl)-1-methyl-2-(3,4-methylenedioxyphenyl)-4-pentenyl}-N-(2-naphthylmethyl)carbamoyl]-3-ethoxycarbonyl-4-hydroxybutanoate