3-formyl-4-oxo-but-2-enoic acid 2,2,2-trichloro-ethyl ester 、
3-tert.butoxycarbonyl-4,4-dimethylazetidino<3,2-d>thiazolidin-2-one 以
正辛烷 为溶剂,
生成 (1
R)-6-[(Ξ)-2,2-diformyl-1-(2,2,2-trichloro-ethoxycarbonyl)-ethyl]-3,3-dimethyl-7-oxo-(1
rH,5
cH)-4-thia-2,6-diaza-bicyclo[3.2.0]heptane-2-carboxylic acid
tert-butyl ester