2-CHLORO-2,2-DIFLUOROACETOPHENONE

Novel and non-ODS-based (ODS = ozone-depleting substance) difluorocarbene reagents for O- and N-difluoromethylation. PhCOCF2Cl reacts with a variety of structurally diverse phenol derivatives to produce aryl difluoromethyl ethers in good yields. PhSO2CF2Cl can react with a variety of structurally diverse phenol derivatives and N-heterocyclic compounds.

2-Chloro-2,2-difluoroacetophenone can be used:

• As a reagent in the difluoromethylation of various phenols to yield aryl difluoromethyl ethers.
• As a precursor in the Baylis-Hillman reaction of fluoroalkyl ketones to obtain chlorodifluoromethyl containing products.
• As a substrate in the synthesis of propargyl alcohols using a novel ruthenium catalyst.

2-Chloro-2,2-difluoroacetophenone is a difluorocarbene reagent, which is generally used in the synthesis of 2,2-difluoro enol silyl ethers, and gem?-difluoromethene derived compounds.