反应详情

To a solution of 2-benzyl-4-methoxybenzoic acid (14.2 g) in 600 mL CH2Cl2 was added a catalytic amount of DMF, followed by a solution of oxalyl chloride (8.7 g) in 100 mL of CH2Cl2. The reaction was stirred at room temp overnight, then concentrated and azeotroped with toluene (2×). The residue was dissolved in 700 mL CH2Cl2 and cooled to 0 C. Tert-butyl amine (13.9 g) was added, and the reaction was warmed to room temp. After 1.5 h, the reaction was quenched with 5% aqueous KHSO4. The organic solution was separated, washed once with saturated aqueous sodium bicarbonate, dried (Na2SO4) and concentrated to give 15.9 g of 2-benzyl-N-tert-butyl)-4-methoxybenzamide.

1. concentrationconcentrated
2. customazeotroped with toluene (2×)
3. dissolutionThe residue was dissolved in 700 mL CH2Cl2
4. temperaturecooled to 0 C
5. additionTert-butyl amine (13.9 g) was added
6. temperaturethe reaction was warmed to room temp
7. waitAfter 1.5 h
8. customthe reaction was quenched with 5% aqueous KHSO4
9. customThe organic solution was separated
10. washwashed once with saturated aqueous sodium bicarbonate
11. dry with materialdried (Na2SO4)
12. concentrationconcentrated