(1S,5R)(E)-6-(t-Butyl-dimethyl-silanyl)-4-methoxycarbonylmethylene-7-oxo-2,6-diazabicyclo[3.2.0]heptane-2-carboxylic acid benzyl ester 在
氟化铵 作用下,
以
甲醇 、
乙酸乙酯 为溶剂,
以1.32 g (84%)的产率得到(1S,5R)(E)-4-Methoxycarbonylmethylene-7-oxo-2,6-diazabicyclo[3.2.0]heptane-2-carboxylic acid benzyl ester