反应详情

A mixture of 2-amino-4-(4-nitrobenzoyl)thiazole g) and 10% palladium on carbon (1 g, 50% wet) in a mixture of tetrahydrofuran (50 ml), methanol (50 ml) and acetic acid (5 ml) was hydrogenated under atmospheric pressure for 7 hours. The reaction mixture was filtered and then, the filtrate was concentrated under reduced pressure. The residue was dissolved in water and adjusted to pH using aqueous sodium bicarbonate. The precipitates were collected by filtration, washed with water and dried in vacuo to give 2-amino-4(4-aminobenzoyl)thiazole (0.54 g, yield: 87.7%).

1. filtrationThe reaction mixture was filtered
2. concentrationthe filtrate was concentrated under reduced pressure
3. dissolutionThe residue was dissolved in water
4. filtrationThe precipitates were collected by filtration
5. washwashed with water
6. customdried in vacuo