methyl (3S)-3-[[(1,1-dimethylethoxy)carbonyl]amino]-5-[2-(1,1-dimethylethoxy)-2-oxoethyl]-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepine-8-carboxylate 在
lithium hydroxide 、
水 作用下,
以
1,4-二氧六环 为溶剂,
以78%的产率得到(3S)-3-[[(1,1-dimethylethoxy)carbonyl]amino]-5-[2-(1,1-dimethylethoxy)-2-oxoethyl]-4-oxo-2,3,4,5-tetrahydro-1,5-benzothiazepine-8-carboxylic acid