反应详情

To a suspension of 3-(benzyloxy)-4-bromo-5-methoxybenzoic acid (2.0 g, 5.93 mmol) and 4 drops of DMF in DCM (40 mL) was slowly added oxalyl chloride (0.57 mL, 6.52 mmol). After three hours the solvent was removed and the residue was redissolved in DCM (10 mL). To this solution was slowly added a mixture of propargylamine (0.46 mL, 7.12 mmol) and triethylamine (2.5 mL, 17.8 mmol) in DCM (2 mL). After 30 minutes the solution was diluted with ether, washed with water (2×), 1 M hydrochloric acid (2×), water, saturated sodium bicarbonate, brine, then dried over magnesium sulfate and concentrated to a yellow solid. The solid was triturated with diethyl ether and dried under vacuum to provide 3-(benzyloxy)-4-bromo-5-methoxy-N-(prop-2-yn-1-yl)benzamide (1.88 g) as an off-white solid. MS=374.0 (M+1).

1. customAfter three hours the solvent was removed
2. dissolutionthe residue was redissolved in DCM (10 mL)
3. additionTo this solution was slowly added
4. washwashed with water (2×), 1 M hydrochloric acid (2×), water, saturated sodium bicarbonate, brine
5. dry with materialdried over magnesium sulfate
6. concentrationconcentrated to a yellow solid
7. customThe solid was triturated with diethyl ether
8. customdried under vacuum