反应详情

3.8 ml of thionyl chloride were added to a suspension of 8.2 g of 4-hydroxy-quinoline-3-carboxylic acid in 160 ml of benzene and the mixture was refluxed for an hour and then cooled. The mixture was vacuum filtered and the precipiate was empasted with a little anhydrous benzene and was dried to obtain 9 g of 4-hydroxy-quinoline-3-carboxylic acid chloride melting at 260° C. The said product was then reacted with 4.35 g of 2-aminothiazole as in Example 1 to obtain 4.3 g of N-(2-thiazolyl)-4-hydroxy-quinoline-3-carboxamide melting at 349°-350° C.

1. temperaturethe mixture was refluxed for an hour
2. temperaturecooled
3. filtrationfiltered
4. customwas dried