tert-butyl 2-[[(1S,4R)-1-(tert-butylsulfamoylmethyl)-7,7-dimethyl-2-bicyclo[2.2.1]heptanylidene]amino]acetate 、
碘甲烷 在
六甲基磷酰三胺 、
lithium diisopropyl amide 作用下,
生成 (R)-2-[(1S,4R)-1-(tert-Butylsulfamoyl-methyl)-7,7-dimethyl-bicyclo[2.2.1]hept-(2E)-ylideneamino]-propionic acid tert-butyl ester 、 (S)-2-[(1S,4R)-1-(tert-Butylsulfamoyl-methyl)-7,7-dimethyl-bicyclo[2.2.1]hept-(2E)-ylideneamino]-propionic acid tert-butyl ester