Réaction #1552089

Équation de réaction

3-(difluoromethyl)-5-fluoro-1-methyl-1H-pyrazole-4-carboxylic acid

thionyl chloride

→

3-(difluoromethyl)-5-fluoro-1-methyl-1H-pyrazole-4-carbonyl chloride

Conditions de réaction

Traitement

1. 1
   TempératureAfter cooling down
2. 2
   Autrethe reaction mixture is evaporated under vacuum

Mode opératoire

9.1 g of 3-(difluoromethyl)-5-fluoro-1-methyl-1H-pyrazole-4-carboxylic acid and 75.5 ml of thionyl chloride are refluxed for 1.5 hours. After cooling down, the reaction mixture is evaporated under vacuum to yield 10 g of 3-(difluoromethyl)-5-fluoro-1-methyl-1H-pyrazole-4-carbonyl chloride as a yellow oil. GC-MS; observed M/z: Molecular ion: (M+)=212; fragments: (M+-Cl)=177 and (M+-F)=193.

Source