Sulfuric Acid → HCID 54005197, compound

Participants

Reaction Steps

A mixture of 1.07 g (2.69 mmol) of 5-[[2-(2-ethoxy-2-oxoethyl)phenyl]carbonyl]-2-methoxybenzenepropanoic acid ethyl ester and 3.63 g (31.41 mmol) of pyridine hydrochloride was heated at 220°-260° C. for 40 min and then cooled to room temperature. Aqueous 3N sulfuric acid (40 mL) was added, and the mixture was worked-up with ethyl acetate in the usual manner. The crude product was dissolved in 150 mL of ethanol. To this solution was added 3 mL of thionyl chloride and the resulting solution was heated at reflux for 16 hr. The solvent was removed in vacuo and the crude product was purified by flash chromatography on 120 g of silica gel, eluting with 3:1 hexane-ethyl acetate. This afforded 0.469 g (45.4%) of the title compound as a pale yellow oil.

Provenance & Evidence