1-(5-Chloro-2-methylphenyl)-3-trimethylsilyoxy-2-aza-1,3-butadiene → 4'-[5-chloro-2-(1-ethyl-1-methoxycarbonyl-propoxy)-phenyl]-6-chloro-2'-(5-chloro-2-methyl-phenyl)spiro[3H-indole-3,3'-piperidine]-2,6'(1H)-dione

Participants

Reaction Steps

In a manner similar to the method described in Example 10d, E/Z-3-[5-chloro-2-(1-methoxycarbonyl-1-ethyl-propoxy)-benzylidene]-6-chloro-2-oxo-2,3-dihydro-indole-1-carboxylic acid tert-butyl ester (2.63 g, 4.9 mmol) prepared in Example 62f was reacted with 1-(5-chloro-2-methyl-phenyl)-3-trimethylsilyoxy-2-aza-1,3-butadiene (20 mmol) prepared in Example 13b in toluene (20 mL) to give the title compound as a white solid (600 mg).

Provenance & Evidence