Z-6-chloro-3-[5-chloro-2-(1-ethoxycarbonyl-1-propyl-butoxy)-benzylidene]-2-oxo-2,3-dihydro-indole-1-carboxylic acid tert-butyl ester → 6-chloro-4'-[5-chloro-2-(1-ethoxycarbonyl-1-propyl-butoxy)-phenyl]-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-6-chloro-3-[5-chloro-2-(1-ethoxycarbonyl-1-propyl-butoxy)-benzylidene]-2-oxo-2,3-dihydro-indole-1-carboxylic acid tert-butyl ester (1.3 g, 2.3 mmol) was reacted with 1-(5-chloro-2-methyl-phenyl)-3-trimethylsilyoxy-2-aza-1,3-butadiene (10 mmol) prepared in Example 13b in toluene to give the title compound as a white solid (310 mg).

Provenance & Evidence