反应详情

A solution of 190 mg (0.6 mmol) of benzyl 4-(chlorosulfonyl)-1-piperidinecarboxylate in 10 mL THF was treated with a 10-fold excess of 40% aq. methylamine and the mixture was stirred at room temperature for 2 hrs. The THF was removed under vacuum. After dilution with water, the resulting solid was collected and dried to give 260 mg (83% yield) of benzyl 4-[(methylamino)sulfonyl]-1-piperidinecarboxylate: mp (aq. MeOH) 124-126° C.; 1H NMR (CDCl3) δ 7.40-7.30 (m, 5H), 5.13 (s, 2H), 4.34 (m, 2H), 4.01 (dd, J=10.2, 5.0 Hz, 1H), 3.05 (tt, J=11.9, 3.7 Hz, 1H), 2.87-2.77 (m, 5H), 2.11 (br d, J=12.9 Hz, 2H), 1.75 (dq, J=12.6, 4.5 Hz, 2H). Anal. Calcd. for C14H20N2O4S: C, 53.8; H, 6.45; N, 9.0. Found: C, 53.75; H, 6.5; N, 9.0%.

1. customThe THF was removed under vacuum
2. customAfter dilution with water, the resulting solid was collected
3. customdried