E-6-chloro-3-propylidene-1,3-dihydro-indol-2-one 、 1-(3-chlorophenyl)-3-trimethylsilyoxy-2-aza-1,3-butadiene 以
甲苯 为溶剂,
以to give racemic (2′S, 3S, 4′S)-6-chloro-2′-(3-chlorophenyl)-4′-ethyl spiro[3H-indole-3,3′-piperidine]-2,6′(1H)-dione as a white solid (Yield 0.21 g, 50%)的产率得到