反应详情

温度

120 °C

2-Chloro-4-methyl-thiazole (33 g, 180 mmol) was added dropwise to a solution of thionyl chloride (32.7 mL, 451 mmol) and chlorosulfonic acid (60.2 mL, 902 mmol). The reaction mixture was stirred for 48 h at 120° C., cooled then poured onto ice-water and extracted 3 times with CH2Cl2, dried over Na2SO4, filtered, and concentrated to give a crude liquid. The product was isolated by simple distillation (17 mbar at 85-95° C.) to give 2-Chloro-4-methyl-thiazole-5-sulfonyl chloride (17.85 g, 43%) as a light-yellow liquid. MS (ISP) 233.0[(M+H)+].

1. temperaturecooled
2. additionthen poured onto ice-water
3. extractionextracted 3 times with CH2Cl2
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated
7. customto give a crude liquid
8. customThe product was isolated by simple distillation (17 mbar at 85-95° C.)