反应详情

温度

2.5 °C

To an ice-cold solution of ammonium hydroxide (75 ml, 25% w/v) is added 6-cyanopyridine-3-sulfonyl chloride (12.5 g) portionwise and the mixture is stirred for 30 minutes at 0-5° C. The reaction mixture is then concentrated to ⅕th of its original volume and cooled. The precipitate is filtered and dried under vacuum to afford the title compound as light brown solid (9 g, Yield 80%). 1H NMR (DMSO-d6:400 MHz) δ 9.10 (1H, s), 8.33-8.35 (1H, m), 8.23-8.25(1H, d); 7.88-8.03 (2H, bs); HPLC (max plot) 98%, Rt 4.67 min; LC/MS: (ES+) 183.8.

1. concentrationThe reaction mixture is then concentrated to ⅕th of its original volume
2. temperaturecooled
3. filtrationThe precipitate is filtered
4. customdried under vacuum