Potassium Carbonate → 1-(5-Amino-2-chloro-4-fluorophenylthio)-cyclopropanecarboxylic acid ethyl ester

Participants

Reaction Steps

A mixture of 12.5 g of 2-(5-amino-2-chloro-4-fluorophenylthio)-4-chlorobutyric acid ethyl ester, 10.6 g of potassium carbonate and 0.7 g of tetrabutylammonium hydrogen sulfate in 14 ml of toluene is maintained at +80° C. for 40 hours. The solid portions of the reaction mixture are then filtered off and washed with acetone. Evaporation of the solvent and recrystallisation from n-hexane and a small amount of ethyl acetate yield 7.9 g of 1-(5-amino-2-chloro-4-fluoro-phenylthio)-cyclopropanecarboxylic acid ethyl ester having a melting point of from +96° to +97° C.

Provenance & Evidence