2-(4-chlorophenylsulfanyl)-3-oxobutyric Acid Methyl Ester → [8-chloro-3-(4-chlorophenylsulfanyl)-2-methyl-4-oxo-1,4-dihydroquinolin-5-yloxy]acetic Acid Methyl Ester

Participants

Reaction Conditions

Reaction Steps

A mixture of (3-amino-4-chlorophenoxy)acetic acid methyl ester (2.1 g), 2-(4-chlorophenylsulfanyl)-3-oxobutyric acid methyl ester (2.5 g), polyphosphoric acid (10 g) and dioxane (30 mL) was heated at 130° C. for 2 days. The mixture was cooled to room temperature and the solvent removed under reduced pressure. The residue was diluted with water and the resulting precipitate collected by filtration, washed with water and dichloromethane and dried to afford title compound, 1.6 g.

Provenance & Evidence