racemic (2'R,3R,4'S,5'S)-5',6-dichloro-4'-(3-chloro-phenyl)-2'-(5-fluoro-2-methyl-phenyl)spiro[3H-indole-3,3'-piperidine]-2,6'(1H)-dione 在
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
以
甲苯 为溶剂,
反应 4.0h,
以37%的产率得到(2'S,3S)-6-chloro-4'-(3-chloro-phenyl)-2'-(5-fluoro-2-methyl-phenyl)-1',3'-dihydrospiro[3H-indole-3,3'(2'H)-pyridine]-2,6'(1H)-dione