反应详情

To a solution of 3-cyano-N-methyl-benzenesulfonamide (4.88 g, 2.49 mmol) in MeOH (160 mL) is added concentrated HCl in water (16 mL) followed by the addition of Palladium on Carbon (10 wt %, 50 wt % water, 1.6 g). With magnetic stirring, the reaction is alternately placed under vacuum and 1 atmosphere of hydrogen (balloon) for three cycles. The reaction is then left under 1 atmosphere of hydrogen with stirring for 2 days. The reaction is filtered through celite and fresh Palladium on Carbon (10 wt %, 50 wt % water, 1.6 g) is added. The reaction is stirred for 24 hours under 1 atmosphere of hydrogen. The reaction is filtered through celite and the filtrate is concentrated in vacuo to provide 3-aminomethyl-N-methyl-benzenesulfonamide hydrochloride, as a solid (99%). MS: 201 (M+H); 1H NMR (300 MHz, DMSO-d6): δ 2.41 (d, 3H), 4.12 (d, 2H), 7.23-7.57 (m, 2H), 7.70 (d, 1H), 7.81 (d, 1H), 8.49 (broad-s, 3H).

1. filtrationThe reaction is filtered through celite and fresh Palladium on Carbon (10 wt %, 50 wt % water, 1.6 g)
2. additionis added
3. stirringThe reaction is stirred for 24 hours under 1 atmosphere of hydrogen
4. filtrationThe reaction is filtered through celite
5. concentrationthe filtrate is concentrated in vacuo