4-Fluorobenzoyl chloride → HCID 178525712, compound

Participants

Reaction Steps

A solution of 1.7 g of 4-fluorobenzoyl chloride in 5 ml of pyridine is treated with 2.8 g of trans-4-[trans-4-(2-(1,3-dioxolan-2-yl)ethyl)cyclohexyl]-cyclohexanol (prepared according to Example 3) and stirred at room temperature for 12 hours. Thereafter, the reaction mixture is poured on to ice-water and extracted three times with diethyl ether. The organic phases are washed in succession with saturated sodium hydrogen carbonate solution, with 10 percent hydrochloric acid, with saturated sodium hydrogen carbonate solution and with water, then dried over magnesium sulfate, filtered and concentrated. Chromatographic purification of the resulting crude product-on silica gel with ethyl acetate/petroleum ether (vol. 3:97) gives 4-fluorobenzoic acid trans-4-[trans-4-[2-(1,3-dioxolan-2-yl)ethyl]cyclohexyl]-cyclohexyl ester.

Provenance & Evidence