rac-(1R,2S,6S)-6'-chloro-2-(3-chlorophenyl)-6-methoxyspiro[cyclohexane-1,3'-[3H]indole]-2',4(1'H)-dione 、
叠氮化钠 、
(3S,4S,5R)-6'-chloro-5-(3-chlorophenyl)-1,1',2,2',3,5,6,7-octahydro-3-methoxy-spiro[4H-azepine-4,3'-[3H]-indole]-2',7-dione 在
四氯化钛 作用下,
以
乙腈 为溶剂,
以to give (3R,4R,5S)-6′-chloro-5-(3-chlorophenyl)-1,1′,2,2′,3,5,6,7-octahydro-3-methoxy-spiro[4H-azepine-4,3′-[3H]-indole]-2′,7-dione (17.6 mg) and (3S,4S,5R)-6′-chloro-5-(3-chlorophenyl)-1,1′,2,2′,3,5,6,7-octahydro-3-methoxy-spiro[4H-azepine-4,3′-[3H]-indole]-2′,7-dione的产率得到rac-(3R,4R,5S)-6'-chloro-5-(3-chlorophenyl)-1,1',2,2',3,5,6,7-octahydro-3-methoxy-spiro[4H-azepine-4,3'-[3H]-indole]-2',7-dione