3,4,4-Trifluoro-3-butenoyl chloride → HCID 21836481, compound

Participants

Reaction Steps

To a solution of 3,4,4-trifluoro-3-butenoyl chloride (3.75 g, 23.65 mmol) in anhyd. ether (100 mL) was treated with copper(I)iodide (2.28 g, 12 mmol) followed by 24 mL of 1.0M solution of benzylmagnesium chloride in ether dropwise at -78° C. with stirring under nitrogen The reaction mixture was stirred at -78° C. for 10 min and allowed to reach to r.t. and filtered. The filtrate was successively washed with 2N HCl 5% sodium bicarbonate and brine, and dried. The residue, a mixture of several products, obtained after evaporation of the solvent was chromatographed over silica gel (20% hexanes in dichloromethane) and the major product (least polar) was isolated and further purified by kugelrohr distillation, b.p. 130°-140° C. (pot temperature) 12 mmHg. Proton and fluorine NMR spectra of this material was found to correspond to the title compound.

Provenance & Evidence