、
methyl (5-chloro-2,2',5'-trioxospiro[indole-3,3'-pyrrolidin]-1(2H)-yl)acetate 、 、
potassium tert-butylate 、
3-氯苄溴 、 Ether tetrahydrofuran 以
N,N-二甲基甲酰胺 为溶剂,
反应 2.0h,
以to give the title compound (2.10 g, 52%) as slightly pink powder after trituration from tetrahydrofuran/diethyl ether的产率得到methyl [5-chloro-1'-(3-chlorobenzyl)-2,2',5'-trioxospiro[indole-3,3'-pyrrolidin]-1(2H)-yl]acetate