Pyrrolidine → Z-3-[4-Bromo-2-(6-chloro-2-oxo-1,2-dihydro-indol-3-ylidenemethyl)-phenoxy]-2,2-dimethyl-propionic acid methyl ester

Participants

Reaction Steps

In a manner similar to the method described in Example 227b, 3-(4-bromo-2-formyl-phenoxy)-2,2-dimethyl-propionic acid methyl ester (3.4 g, 10.8 mmol) was reacted with 6-chlorooxindole (1.8 g, 10.8 mmol) and pyrrolidine (0.84 g, 11.8 mmol) in methanol to give E/Z-3-[4-Bromo-2-(6-chloro-2-oxo-1,2-dihydro-indol-3-ylidenemethyl)-phenoxy]-2,2-dimethyl-propionic acid methyl ester as a yellow solid (2.7 g).

Provenance & Evidence