Ethanethiol → Ethyl 2-[[4-hydroxybenzenesulfonyl](isobutyl)amino]acetate

Participants

Reaction Steps

A solution of ethanethiol (15 mL) and methylene chloride (15 mL) is cooled to 0° C. Aluminum trichloride (9.62 g, 72.2 mmol) is added (the solution turns green), and the reaction is warmed to room temperature. Ethyl 2-[[4-methoxybenzenesulfonyl](isobutyl)-amino]acetate (4.75 g, 14.44 mmol) is added in methylene chloride (5 mL), and the reaction is stirred for 3.5 hours at room temperature. The reaction is then slowly quenched with water, and the crude reaction is partitioned between water and methylene chloride. The aqueous layer is extracted well with methylene chloride, the combined organic layers are dried (Na2SO4), and the solvent is evaporated. The product is purified by silica gel chromatography (25% to 50% ethyl acetate/hexane) to give ethyl 2-[[4-hydroxybenzenesulfonyl](isobutyl)amino]acetate.

Provenance & Evidence