1-methyl-7-(trifluoromethyl)indoline-2,3-dione 、
(diethylcarbamoyl)methyl-[(1R, 2S, 3R)-2-methoxy-1,7,7-trimethylbicyclo[2.2.1] hept-3-yl]methylsulfonium bromide 在
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
以
乙醚 为溶剂,
反应 48.5h,
以70%的产率得到(3R,3'R)-N,N-diethyl-1-methyl-2-oxo-7-(trifluoromethyl)spiro[indoline-3,2'-oxirane]-3'-carboxamide