1-溴-1-硝基乙烷 、 tert-butyl 5-bromo-3-(2-ethoxy-2-oxoethylidene)-2-oxoindole-1-carboxylate 在
N-(9-epi-hydroquinidin-9-yl)-N'-[3,5-bis(CF
3)phenyl]thiourea 、
sodium carbonate 作用下,
以
甲基叔丁基醚 为溶剂,
反应 48.08h,
生成 1'-tert-butyl 3-ethyl 5'-bromo-2-methyl-2-nitro-2'-oxospiro[cyclopropane-1,3'-indoline]-1',3-dicarboxylate 、
(1S,2S,3R)-1'-tert-butyl 3-ethyl 5'-bromo-2-methyl-2-nitro-2'-oxospiro[cyclopropane-1,3'-indoline]-1',3-dicarboxylate