反应详情

To a solution of 5-(aminomethyl)-2-chlorobenzoic acid hydrochloride (17.0 g, 76.5 mmol) in methanol (200 mL) was added conc.H2SO4 (15 mL). The reaction mixture was refluxed for 15 h. The reaction mixture was concentrated and water was added. The aq. solution was basified with sodium bicarbonate. The reaction mixture was extracted with 10% MeOH:DCM and concentrated to afford 15.0 g of desired product. 1H NMR (300 MHz, DMSO d6): δ 2.1 (br s, 2H), 3.73 (s, 2H), 3.85 (s, 3H), 7.50 (s, 2H), 7.77 (s, 1H); MS (m/z): 200.05 (M+H)+.

1. temperatureThe reaction mixture was refluxed for 15 h
2. concentrationThe reaction mixture was concentrated
3. additionwater was added
4. extractionThe reaction mixture was extracted with 10% MeOH
5. concentrationDCM and concentrated