反应详情

Oxalyl chloride (0.5 ml) was added slowly to a stirred mixture of 4-acetoxybenzoic acid (1.09 g), methylene chloride (30 ml) and DMF (one drop) and the mixture was stirred at ambient temperature for 2 hours. A solution of 2-methyl-5-nitroaniline (0.76 g) and pyridine (2 ml) in methylene chloride was added over 15 minutes and the mixture was stirred for a further 2 hours. The reaction mixture washed with a 5% aqueous acetic acid solution, with water and with a 5% aqueous sodium bicarbonate solution. The organic extract was dried (MgSO4) and evaporated. The residue was recrystallised from ethyl acetate to give N-(2-methyl-5-nitrophenyl)-4-acetoxybenzamide (0.8 g), m.p. 207-208° C.; NMR Spectrum: (DMSOd6) 2.3 (s, 3H), 7.31 (d, 2H), 7.56 (d, 1H), 8.02 (m, 3H), 8.47 (d, 1H), 10.12 (s, 1H).

1. stirringthe mixture was stirred for a further 2 hours
2. washThe reaction mixture washed with a 5% aqueous acetic acid solution, with water and with a 5% aqueous sodium bicarbonate solution
3. extractionThe organic extract
4. dry with materialwas dried (MgSO4)
5. customevaporated
6. customThe residue was recrystallised from ethyl acetate