反应详情

温度

0 °C

To a solution of N-((5-bromopyridin-3-yl)methyl)ethanesulfonamide (1.8 g, 5.55 mmol) and triethylamine (1.683 g, 16.64 mmol) in DCM (20 mL) at 0° C. is added ethanesulfonyl chloride (1.426 g, 11.09 mmol), and the mixture is stirred at 0° C. for 1 h. Silica gel (10 g) is added and the mixture is concentrated in vacuo. The residue is purified by silica chromatography eluting with 0 to 2% MeOH-DCM to give N-((5-bromopyridin-3-yl)methyl)-N-(ethylsulfonyl)ethanesulfonamide. 1H NMR (400 MHz, DMSO-d6) δ ppm 1.14 (t, J=7.3 Hz, 6H), 3.48 (q, J=7.3 Hz, 4H), 4.92 (s, 2H), 8.0 (t, J=2.1 Hz, 1H), 8.59 (d, J=2.0 Hz, 1H), 8.72 (d, J=2.3 Hz, 1H).

1. additionSilica gel (10 g) is added
2. concentrationthe mixture is concentrated in vacuo
3. customThe residue is purified by silica chromatography
4. washeluting with 0 to 2% MeOH-DCM