Sodium hydride → Phenyl p-(2-pyrrolidinoethoxy)benzoate

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Reaction Conditions

Reaction Steps

The title product was prepared as described iin U.S. Pat. No. 4,230,862. To 300 ml of N,N-dimethylformamide were added 107 grams of phenyl p-hydroxybenzoate and 26 grams of sodium hydride (50 percent in oil). The mixture was heated to 60° C. and maintained at this temperature for about two hours. To this mixture was added 1-chloro-2-pyrrolidin-1-ylethane (67 g), and the mixture was stirred overnight at 85° C. The bulk of the N,N-dimethylformamide then was evaporated from the mixture. Water was added to the residue, and the aqueous mixture was extracted with ethyl acetate. The ethyl acetate extract was concentrated, and the residue was dissolved in a 1:1 mixture of ether and ethyl acetate. The organic solution was then extracted with 2N hydrochloric acid, and the acid extract was added dropwise to 2N sodium hydroxide. The resulting mixture was extracted with ethyl acetate, and the ethyl acetate extract was washed and then dried over magnesium sulfate. The ethyl acetate was concentrated to obtain 110 grams of crude phenyl p-(2-pyrrolidin-1-ylethoxy)benzoate.

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