Triethylamine → 4-Cyano-2,5-difluorobenzyl methanesulfonate

Participants

Reaction Steps

To an ice cooled solution of 2,5-difluoro-4-hydroxymethylbenzonitrile (3.10 g, 0.0183 mol; see step (iii) above) and methanesulfonyl chloride (2.21 g, 0.0192 mol) in 60 mL of methylene chloride was added triethyl amine (1.95 g, 0.0192 mol) with stirring. After 1.5 h at 0° C. the mixture was washed with water, dried (Na2SO4) and evaporated. The product could be used without further purification. Yield: 4.5 g (99%).

Provenance & Evidence