(2S,5R)-6-Diazo-3,3-dimethyl-7-oxo-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid 2,2,2-trichloro-ethyl ester 、
丙烯酸乙酯 以
二氯甲烷 为溶剂,
生成
(6'S)-3',3'-dimethyl-7'-oxo-2,4-dihydro-(5'cH,6'rN)-spiro[pyrazole-3,6'-(4-thia-1-aza-bicyclo[3.2.0]heptane)]-5,2'c-dicarboxylic acid 5-ethyl ester 2'-(2,2,2-trichloro-ethyl) ester 、 (6'
R)-3',3'-dimethyl-7'-oxo-2,4-dihydro-(5'
tH,6'
rN)-spiro[pyrazole-3,6'-(4-thia-1-aza-bicyclo[3.2.0]heptane)]-5,2'
t-dicarboxylic acid 5-ethyl ester 2'-(2,2,2-trichloro-ethyl) ester