1-(5-fluoro-2-methyl-phenyl)-3-trimethylsilyoxy-2-aza-1,3-butadiene 、
E/Z-6-chloro-3-[5-chloro-2-(1-cyano-cyclopentylmethoxy)-benzylidene]-2-oxo-2,3-dihydro-indole-1-carboxylic acid tert-butyl ester 以
甲苯 为溶剂,
生成 (2'S,3S,4'R)-6-chloro-4'-[5-chloro-2-(1-cyano-cyclopentyl-methoxy)-phenyl]-2'-(5-fluoro-2-methyl-phenyl)-2,3-dihydro-2,6'-dioxo spiro[indole-3,3'-piperidine]-1-carboxylic acid tert-butyl ester