benzyl (S)-1-((1S,2R)-4-isopropoxy-2-(isopropylsulfonylmethyl)cyclohexylamino)-4-(methylthio)-1-oxobutan-2-ylcarbamate 、
Dicaesio carbonate 在
二氯甲烷 、
氯化铵 、
乙酸乙酯 、 Brine 、
magnesium sulfate 、
benzyl (S)-1-((1S,2R,4R)-4-isopropoxy-2-(isopropylsulfonylmethyl)cyclohexyl)-2-oxopyrrolidin-3-ylcarbamate A 作用下,
以
二甲基亚砜 为溶剂,
反应 28.0h,
以to get benzyl (S)-1-((1S,2R,4R)-4-isopropoxy-2-(isopropylsulfonylmethyl)cyclohexyl)-2-oxopyrrolidin-3-ylcarbamate A (faster isomer, 0.41 g, oil) and benzyl (S)-1-((1S,2R,4R)-4-isopropoxy-2-(isopropylsulfonylmethyl)cyclohexyl)-2-oxopyrrolidin-3-ylcarbamate B (slower isomer, 0.62 g, white solid)的产率得到benzyl (S)-1-((1S,2R,4R)-4-isopropoxy-2-(isopropylsulfonylmethyl)cyclohexyl)-2-oxopyrrolidin-3-ylcarbamate A