反应详情

In a manner similar to the method described in example 4b, E/Z-6-chloro-3-cyclopentylmethylene-1,3-dihydro-indol-2-one (0.8 g, 3.2 mmol) was reacted with ethyl chloroformate (0.46 mL, 4.9 mmol) and triethylamine (0.9 mL, 6.4 mmol) in dichloromethane to give E/Z-6-chloro-3-cyclopentylmethylene-2-oxo-2,3-dihydro-indole-1-carboxylic acid ethyl ester as brown oil (Yield 0.6 g, 58%).