二硫代脲 、 (S)-3,3-Dimethyl-4,7-dioxo-4λ
4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid methyl ester 以
1,4-二氧六环 为溶剂,
反应 12.0h,
以90%的产率得到(R)-2-(2-{4-[1-((R)-1-Methoxycarbonyl-2-methyl-allyl)-4-oxo-azetidin-2-yldisulfanyl]-pyrimidin-2-yldisulfanyl}-4-oxo-azetidin-1-yl)-3-methyl-but-3-enoic acid methyl ester