反应详情

To a solution of (2-methylphenyl)acetic acid in dry methylene chloride (16.7 g, 108.4 mmol) under nitrogen atmosphere was added N,O-dimethylhydroxylamine (13.8 g, 141.5 mmol), triethylamine (20 mL, 143.8 mmol), 4-dimethylaminopyridine (DMAP, 14.2 g, 119.3 mmol) and EDC (27 g, 140.6 mmol). The reaction mixture was stirred at RT for 2 hr then transferred to a separation funnel. The mixture was washed consecutively with 2 N aq. HCl, brine, saturated aq. NaHCO3 and brine. The organic layer was dried over MgSO4, filtered and the solvent evaporated under vacuum to give 21 g of the crude title compound which was used without further purification. 1H-NMR (CDCl3): δ: 7.20 (4H, m), 3.80 (2H, s), 3.65 (2H, s), 3.65 (3H, s), 2.34 (3H, m).

1. customthen transferred to a separation funnel
2. washThe mixture was washed consecutively with 2 N aq. HCl, brine, saturated aq. NaHCO3 and brine
3. dry with materialThe organic layer was dried over MgSO4
4. filtrationfiltered
5. customthe solvent evaporated under vacuum