Hydrochloric Acid → HCID 131731754, compound

Participants

Reaction Steps

A solution of 0.77 mL (1.3 mmol) of potassium tert-pentoxyde solution (1.7M in toluene) is added dropwise at room temperature to a stirred solution of 52 mg (1.27 mmol) of acetonitrile in 2.5 mL of tetrahydrofuran followed by dropwise addition of 0.19 g (0.44 mmol) of (4-{2-[4-(3-trifluoromethylphenyl)piperazin-1-yl]ethyl}piperidin-1-yl)acetic acid ethyl ester in 1 mL of tetrahydrofuran. After 30 minutes at room temperature, the reaction mixture is diluted with 10 mL of an aqueous 0.2N aqueous hydrochloric acid solution and 50 mL of ethyl acetate forming an emulsion. The mixture is concentrated under reduced pressure and the product is purified over 10 g of silica gel (eluant dichloromethane/methanol 95/5). The oily product is dissolved in 2 mL of diethyl ether and acidified with a hydrochloric acid diethyl ether solution. The precipitate is filtered, washed with diethyl ether and dried under reduced pressure to give 30 mg (14%) of 3-oxo-4-(4-{2[4-(3-trifluoromethylphenyl)piperazin-1-yl]ethyl}piperidin-1-yl)butanenitrile, dihydrochloride.

Provenance & Evidence