Acetyl chloride → HCID 21482397, compound

Participants

Reaction Steps

13 G of 2-cyclopropyl-4-(m-trifluoromethylphenyl)-5-methylpyrrolidine, 6 ml of acetyl chloride and 8 ml of triethylamine in 50 ml of anhydrous benzene is stirred at ambient temperature for 18 hours. Ice is added to the reaction mixture and the organic products are extracted with ether; the ethereal extract is washed with water, with 5% sodium hydroxide and then again with water, and dried over sodium carbonate to give 14.4 g of N-acetyl-2-cyclopropyl-4-(m-trifluoromethylphenyl)-5-methylpyrrolidine, which is dissolved in 50 ml of anhydrous tetrahydrofuran and added dropwise to a suspension of 2.9 g of lithium aluminium hydride in 75 ml of anhydrous tetrahydrofuran at reflux temperature. Refluxing is then continued for 4 hours. The excess double hydride is destroyed with cold ethyl acetate. After adding water and ice, the mixture is extracted with ether; the ethereal extract is washed with water and dried over sodium carbonate. After evaporation of the ether, vacuum distillation of the residue gives 9.7 g of N-ethyl-2-cyclopropyl-4-(m-trifluoromethylphenyl)-5-methylpyrrolidine as a liquid. Boiling point 0.3 = 115° C.

Provenance & Evidence