Hydrochloric Acid → HCID 57704520, compound

Participants

Reaction Steps

To a suspension of potassium t-butoxide (20.7 g) in N,N-dimethylformamide (120 ml) was added n-heptanol (15.6 ml), and the mixture was stirred at room temperature for 30 min. A solution of 4-fluoro-3-trifluoromethylbenzoic acid (16.7 g) in N,N-dimethylformamide (60 ml) was added dropwise to the reaction mixture at 0° C., and the mixture was stirred at 70° C. for 1 hr. The reaction mixture was ice-cooled, water (320 ml) was added, and 6M-hydrochloric acid (40 ml) was added at room temperature. The mixture was stirred at room temperature for 30 min and precipitated crystals were collected by filtration. The crystals were dissolved in ethanol (60 ml) at 70° C., water (96 ml) was added dropwise at the same temperature and the mixture was stirred for 30 min. The mixture was allowed to cool to room temperature, and stirred for 30 min under ice-cooling. The precipitated crystals were collected by filtration to give the object product (24.1 g) as pale-brown crystals.

Provenance & Evidence