重氮甲烷 、
(3S,7aR)-7-Hydroxy-2,2-dimethyl-6-(4-nitro-phenyl)-5-oxo-2,3,5,7a-tetrahydro-pyrrolo[2,1-b]thiazole-3-carboxylic acid 2,2,2-trichloro-ethyl ester 以
乙酸乙酯 为溶剂,
以69%的产率得到(3S,7aR)-2,2,2-trichloroethyl 2,3,5,7a-tetrahydro-7-methoxy-2,2-dimethyl-6-(4-nitrophenyl)-5-oxopyrrolo<2,1-b>thiazole-3-carboxylate