Ethyl 2-methylacetoacetate → HCID 178492457, compound

Participants

Reaction Conditions

Reaction Steps

A mixture composed of 2.9 g of 3-chloro-4-(4-methoxyphenoxy)-aniline, 2.9 g of ethyl 2-methylacetoacetate, and 0.5 mL of ethanol was added dropwise to 4.2 g of polyphosphoric acid heated to 150° C. This reaction solution was stirred at 140 to 150° C. while removing ethanol by evaporation for 3 hr and was then poured into 195 mL of iced water containing 2 mL of concentrated hydrochloric acid. The crystals were collected by filtration and were washed with n-hexane to give 3.29 g of a mixture of 5-chloro-6-(4-methoxyphenoxy)-4-hydroxy-2,3-dimethyl-quinoline with 7-chloro-6-(4-methoxyphenoxy)-4-hydroxy-2,3-dimethyl-quinoline (yield 100%).

Provenance & Evidence