Lithium Hydroxide → 2-tert-Butyl-4-cyclopropyl-6-{4-[3-(pyrimidin-2-ylsulfanyl)-propyl]-piperazin-1-yl}-pyrimidine

Participants

Reaction Conditions

Reaction Steps

0.4 g of 2-mercapto-pyrimidine (3.57 mmol) were dissolved in 20 ml of dimethylformamide. After addition of 0.09 g of lithium hydroxide (3.57 mmol) and 0.27 g of sodium iodide (1.78 mmol), the reaction mixture was stirred at 60° C. and 1.2 g of 2-tert-butyl-4-[4-(3-chloro-propyl)-piperazin-1-yl]-6-cyclopropyl-pyrimidine (3.56 mmol) were added in portions. The reaction mixture was stirred at 60° C. for 1 h, and, after evaporation of dimethylformamide, the residue was partitioned between 30 ml of ethyl acetate and 15 ml of saturated aqueous sodium chloride solution and 15 ml of water. The aqueous phase was re-extracted twice with ethyl acetate. The combined organic layers were dried over magnesium sulfate, filtered, and concentrated to dryness. The crude product was re-dissolved in 30 ml of ethyl acetate and treated with 4 N hydrochloric acid in dioxane. The precipitated hydrochloride salt was collected by filtration and dried to yield 1.66 g of the title compound.

Provenance & Evidence