Z-6-chloro-3-[1-(3-fluoro-phenyl)-methylidene]-2-oxo-2,3-dihydro-indole-1-carboxylic acid tert-butyl ester 、
4-chloro-1-[5-chloro-2-(tetrahydro-pyran-4-yloxy)-phenyl]-3-trimethylsilyloxy-2-aza-1,3-butadiene 、
三氟乙酸 在
racemic(2′R,3R,4′S, 5′S)-5′,6-dichloro-2′-[5-chloro-2-(tetrahydro-pyran-4-yloxy)-phenyl] 作用下,
以
甲苯 、
二氯甲烷 为溶剂,
以to give racemic(2′R,3R,4′S, 5′S)-5′,6-dichloro-2′-[5-chloro-2-(tetrahydro-pyran-4-yloxy)-phenyl]]-4′-(3-fluoro-phenyl)spiro[3H-indole-3,3′-piperidine]-2,6′(1H)-dione as a yellow solid (Yield 0.15 g, 32%)的产率得到4'-(3-fluoro-phenyl)spiro[3H-indole-3,3'-piperidine]-2,6'(1H)-dione