反应详情

A solution of N-(4-hydroxyphenyl)acetamide (paracetamol) (1) (1.50 g) and 1,3-dibromobutane (14) (10.0 ml) in ethyl methyl ketone (25.0 ml) containing potassium carbonate (5.0 g) was stirred overnight at room temperature. The reaction mixture was filtered, residue washed with ethyl methyl ketone and solvent evaporated under reduced pressure to get the residue. The residue was dissolved in chloroform (200.0 ml), washed with 5% NaOH solution (3×100 ml), water (3×50 ml), dried, filtered and crystallized from methanol to get the desired product N-[4-(3-Bromo-propoxy)-phenyl]-acetamide (16) (2.01 g, 75.8%), mp 115-118° C.

1. filtrationThe reaction mixture was filtered
2. washresidue washed with ethyl methyl ketone and solvent
3. customevaporated under reduced pressure
4. customto get the residue
5. washwashed with 5% NaOH solution (3×100 ml), water (3×50 ml)
6. customdried
7. filtrationfiltered
8. customcrystallized from methanol