Hydrochloric Acid → 1-(3-Chloro-4-ethoxy-2-fluorophenyl)-4-pentylcyclohexanol

Participants

Reaction Conditions

Reaction Steps

2.9 g of well dried magnesium and 20 mL of THF were placed in a reactor under nitrogen atmosphere, and heated to 43° C. 30.0 g of 1-bromo-3-chloro-4-ethoxy-2-fluoro benzene (1) dissolved in 80 mL of THF was slowly added dropwise thereto at a temperature range of from 38 to 46° C., followed by stirring for 90 minutes. Thereafter, 19.0 g of 4-pentylcyclo hexanone dissolved in 20 mL of THF was slowly added dropwise thereto at a temperature range of from 38 to 44° C., followed by stirring for 60 minutes. After cooling the resulting reaction mixture to 30° C., the reaction mixture was mixed with 100 mL of 3N hydrochloric acid and 100 mL of toluene in a vessel and separated into an organic layer and an aqueous layer by standing still, so as to attain extraction. The resulting organic layer was fractionated and washed with water, a 2N sodium hydroxide aqueous solution, a saturated sodium bicarbonate aqueous solution and water, followed by drying over anhydrous magnesium sulfate. Thereafter, the solvent was removed by distillation under reduced pressure to obtain 39.5 g of 1-(3-chloro-4-ethoxy-2-fluorophenyl)-4-pentylcyclohexanol (3). The resulting compound (3) was a yellow oily matter.

Provenance & Evidence