、
racemic (2'R,3R,4'S)-6-chloro-4'-(3-chlorophenyl)-2,3-dihydro-2'-(2-methylphenyl)-2,6'-dioxospiro[indole-3,3'-piperidine]-1-carboxylic acid tert-butyl ester 、
lithium;hydride 、
碘乙烷 以
N,N-二甲基甲酰胺 为溶剂,
以to give racemic (2′R,3R,4′S)-6-chloro-4′-(3-chlorophenyl)-1′-ethyl-2,3-dihydro-2′-(2-methylphenyl)-2,6′-dioxo spiro[indole-3,3′-piperidine]-1-carboxylic acid tert-butyl ester as a white foam (Yield: 0.2 g, 63%)的产率得到racemic (2'R,3R,4'S)-6-chloro-4'-(3-chlorophenyl)-1'-ethyl-2,3-dihydro-2'-(2-methylphenyl)-2,6'-dioxo spiro[indole-3,3'-piperidine]-1-carboxylic acid tert-butyl ester