反应详情

A mixture of 6-thiophen-3-yl-1,3-dihydroindol-2-one (100 mg, 0.5 mmol), 2-hyroxy-benzaldehyde (60 mg, 0.5 mmol) and piperidine (0.23 mL) in ethanol (4 mL) was stirred at reflux overnight. The precipitate was collected by vacuum filtration, washed with ethanol and dried to give 110 mg (69%) of 3-(2-hydroxybenzylidene)-6-thiophen-3-yl-1,3-dihydroindol-2-one as yellow-red crystals.

1. temperatureat reflux overnight
2. filtrationThe precipitate was collected by vacuum filtration
3. washwashed with ethanol
4. customdried