反应详情

2-Methoxybenzoyl chloride (8.8 g, 0.05 mole) was added at room temperature under a dry nitrogen atmosphere to a stirred mixture of 1-methylethyl 5-amino-2-chlorobenzoate (10.7 g, 0.05 mole), triethylamine (5.6 g, 0.055 mole) and 4-(N,N,-dimethylamino)pyridine (catalyst, 0.2 g) dissolved in dry p-dioxane (100 ml . A solid Precipitate formed. Following the initial exothermic reaction (temperature increased to about 45° C.), the reaction mixture was stirred under nitrogen at room temperature for 20 hours. Next, the reaction mixture was added to water (500 ml), resulting in the precipitation of a solid product, which was collected by vacuum filtration, washed with water (500 ml), and dried to yield 16.2 g of the title compound, m.p. 94°-96° C. NMR: (CDCl3) : 1.40 (6H,d) 4.05 (3H,s)5.28 (1H,m), 7.02 (1H,d), 7.11 (1H,m), 7.38 (1H,d), 7.49 (1H,m), 7.87 (1H,m), 7.95 (1H,d), 8.25 (1H,m), 9.86 (1H,s)

1. customA solid Precipitate formed
2. customexothermic reaction (temperature increased to about 45° C.)
3. customresulting in the precipitation of a solid product, which
4. filtrationwas collected by vacuum filtration
5. washwashed with water (500 ml)
6. customdried