反应详情

To 4-methyl-5-(2-methyl-5-quinolinyl)-2,4-dihydro-3H-1,2,4-triazole-3-thione (3.6 g, preparation reported in WO 02/40471) in ethanol (60 ml) containing 1-bromo-3-chloropropane (2.0 ml) was carefully added with stirring sodium hydride (0.60 g, 60% in mineral oil). The mixture was heated at reflux for 45 min. Volatiles were evaporated under reduced pressure and the residue submitted to column chromatography (EtOAc—acetone gradient). The material thus obtained was precipitated from hot EtOAc (20 ml) by adding petroleum ether (40-60, 50 ml), cooled and collected by filtration to provide the title compound as colourless crystals (2.1 g).

1. temperatureThe mixture was heated
2. temperatureat reflux for 45 min
3. customVolatiles were evaporated under reduced pressure
4. customThe material thus obtained
5. customwas precipitated from hot EtOAc (20 ml)
6. additionby adding petroleum ether (40-60, 50 ml)
7. temperaturecooled
8. filtrationcollected by filtration