反应详情

温度

90 °C

A mixture of 4-(2-hydroxy-ethyl)-1,3-dihydro-indol-2-one (39 mg, 0.22 mmol), 1H-indole-5-carbaldehyde (32 mg, 0.22 mmol) and 1 drop of piperidine in ethanol was heated at 90° C. for overnight and cooled to room temperature. The reaction mixture was concentrated and the residue was purified on silica gel column to give 48 mg (72%) of 4-(2-hydroxy-ethyl)-3-(1H-indol-5-ylmethylene)-1,3-dihydro-indol-2-one as a yellow solid.

1. temperaturecooled to room temperature
2. concentrationThe reaction mixture was concentrated
3. customthe residue was purified on silica gel column