Thionyl Chloride → 1-[2-Chloro-4-fluoro-5-(1,2,3,4,5,6-hexahydro-1,3-dioxo-isoindolyl)-phenylthio]-cyclopropanecarboxylic acid chloride

Participants

Reaction Steps

While stirring at room temperature, 3 ml of thionyl chloride are added to a solution of 1 g of 1-[2-chloro-4-fluoro-5-(1,2,3,4,5,6-hexahydro-1,3-dioxo-isoindolyl)-phenylthio]-cyclopropanecarboxylic acid and one drop of dimethylformamide in 40 ml of ethylene chloride and the reaction mixture is then heated under reflux for 3 hours. Concentration of the reaction mixture by evaporation yields 1 g of 1-[2-chloro-4-fluoro-5-(1,2,3,4,5,6-hexahydro-1,3-dioxo-isoindolyl)-phenylthio]-cyclopropanecarboxylic acid chloride in the form of an oil.

Provenance & Evidence