Benzoic acid (S)-[(4S,4aS,6R,7R,8R,8aR)-7-acetoxy-6-(2,2-dimethyl-propionyloxymethyl)-8-methoxy-hexahydro-pyrano[3,2-d][1,3]dioxin-4-ylcarbamoyl]-((2R,5R,6R)-2-methoxy-5,6-dimethyl-4-methylene-tetrahydro-pyran-2-yl)-methyl ester 在
lithium hydroxide 作用下,
以
甲醇 为溶剂,
生成 (2S)-N-[(4S,4aS,6R,7R,8S,8aR)-7-hydroxy-6-(hydroxymethyl)-8-methoxy-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-4-yl]-2-hydroxy-2-[(2R,5R,6R)-2-methoxy-5,6-dimethyl-4-methylideneoxan-2-yl]acetamide