反应详情

3-Butyryl-4-(2-methylphenylamino)quinoline-8-carbaldehyde (0.5 q, 1.5 mmol) was dissolved in dichloromethane (5 ml) and trimethylsulphonium methylsulphate (0.34 g, 1.8 mmol) and 50% aqueous sodium hydroxide (0.75 ml) added. The mixture was stirred vigorously for 2.5 hours, when a further addition of trimethylsulphonium methylsulphate (0.23 g, 1.2 mmol) and 50% aqueous sodium hydroxide (0.5 ml) was made. After stirring for a further 2 hours the mixture was diluted with water and extracted with dichloromethane. The dried extracts were evaporated to an oil, which was purified by flash chromatography (silica gel, ethyl acetate/chloroform). The product crystallised on trituration with petroleum ether to give 3-butyryl-4-(2-methylphenylamino)-8-oxiranylquinoline (0.28 g, 54%), m.p. 114°-116°.

1. stirringAfter stirring for a further 2 hours the mixture
2. extractionextracted with dichloromethane
3. customThe dried extracts were evaporated to an oil, which
4. customwas purified by flash chromatography (silica gel, ethyl acetate/chloroform)
5. customThe product crystallised on trituration with petroleum ether