反应详情

A solution of 430 mg (1.35 mmol) of benzyl 4-(chlorosulfonyl)-1-piperidinecarboxylate in 10 mL THF was treated with a 5-fold excess of N,N-dimethylethylenediamine and the mixture was stirred at room temperature for 2 hrs. The THF was removed under vacuum. After dilution with water, the product was extracted with CH2Cl2 and dried. Chromatography on alumina, eluting with EtOAc, gave 450 mg (90% yield) of benzyl 4-({[2-(dimethylamino)ethyl]amino}sulfonyl)-1-piperidinecarboxylate as an oil: 1H NMR (CDCl3) δ 7.40-7.30 (m, 5H), 5.13 (s, 2H), 4.33 (m, exchangeable with D2O, 1H), 3.16 (m, 2H), 3.04 (tt, J=11.9, 3.7 Hz, 1H), 2.81 (br t, J=11.9 Hz, 1H), 2.43 (m, 2H), 2.22 (s, 6H), 2.12 (br d, J=12.8 Hz, 2H), 1.74 (ddd, J=25.0, 12.6, 4.5 Hz, 2H).

1. customThe THF was removed under vacuum
2. extractionAfter dilution with water, the product was extracted with CH2Cl2
3. customdried
4. washChromatography on alumina, eluting with EtOAc