反应详情

In a typical run, ethyl 2-aminothiazole-4-carboxylate (2.1 g, 0.0123 mol) was taken up in methyl ethyl ketone (25 mL) along with 2-bromo-2′-nitroacetophenone (3.0 g, 0.0123 mol). The reaction mixture was stirred under reflux for 18 hours. It was then cooled to room temperature and filtered to remove some of the solids. The filtrate was concentrated to afford 3.10 g of 6-(2-nitro-phenyl)-imidazo[2,1-b]thiazole-3-carboxylic acid ethyl ester (Calc'd for C14H12N3O4S: 318.3, [M+H]+found: 319).

1. temperatureunder reflux for 18 hours
2. filtrationfiltered
3. customto remove some of the solids
4. concentrationThe filtrate was concentrated