反应详情

To a solution of 5-(4-nitro-phenyl)-oxazole (500 mg, 2.6 mmol) in ethanol (10 ml) was added tin (620 mg, 5.2 mmol), followed by dropwise addition of concentrated hydrochloric acid (1 ml) and then the reaction was stirred at room temperature for 2 hr. The reaction mixture was filtered and the filtrate evaporated to dryness. The resultant residue was diluted with water (10 ml), basified with saturated bicarbonate solution, then extracted with ethyl acetate. The organic layer was separated, washed with water, dried and concentrated to dryness to yield 4-oxazol-5-yl-phenylamine (380 mg, 90%) as solid.

1. filtrationThe reaction mixture was filtered
2. customthe filtrate evaporated to dryness
3. additionThe resultant residue was diluted with water (10 ml)
4. extractionextracted with ethyl acetate
5. customThe organic layer was separated
6. washwashed with water
7. customdried
8. concentrationconcentrated to dryness