benzyl (S)-1-((1S,2S,4R)-4-(tert-butyldimethylsilyloxy)-2-isopropylcyclohexylamino)-4-(methylthio)-1-oxobutan-2-ylcarbamate 、
Dicaesio carbonate 在
二氯甲烷 、
乙酸乙酯 、 Brine 、
magnesium sulfate 作用下,
以
碘甲烷 、
二甲基亚砜 为溶剂,
反应 78.0h,
以to afford benzyl (S)-1-((1S,2S,4R)-4-hydroxy-2-isopropylcyclohexyl)-2-oxopyrrolidin-3-ylcarbamate [580 mg; MS found: (M+H)+=375.3] and benzyl (S)-1-((1S,2S,4R)-4-(tert-butyldimethylsilyloxy)-2-isopropylcyclohexyl)-2-oxopyrrolidin-3-ylcarbamate [1.0 g; MS found: (M+H)+=489.4]的产率得到benzyl (S)-1-((1S,2S,4R)-4-hydroxy-2-isopropylcyclohexyl)-2-oxopyrrolidin-3-ylcarbamate