The important role of N,N-Dimethyl-1H-pyrazole-1-sulfonamide

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.

Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 133228-21-4, name is N,N-Dimethyl-1H-pyrazole-1-sulfonamide, A new synthetic method of this compound is introduced below., COA of Formula: C5H9N3O2S

N,N-dimethyl-lH-pyrazole-l -sulfonamide (8.89 g, 50.8 mmol) was dissolved in anhydrous THF (250 mL). The solution was cooled at -78C, a solution of n-butyl lithium (32.6 mL, 81.4 mmol, 2.5 M in hexane) was added dropwise, and then the mixture was stirred for 45 minutes. A solution of hexachloroethane (18.0 g, 76.3 mmol) in anhydrous THF (20 mL) was added dropwise at -78C, and the reaction stirred for 1.5 hours. Water was added, and the mixture was extracted 5 times with dichloromethane. The combined organic phases were washed with brine and then dried over magnesium sulfate. After evaporation of the solvent, 5-chloro-N,N- dimethyl-lH-pyrazole-1 -sulfonamide was obtained and used in the next step without further purification.

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.