反应详情

While stirring at room temperature, 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 chloride obtained in accordance with Example P9 in 10 ml of methyl acetate is added dropwise to a solution of 10 ml of methanol and 0.5 ml of triethylamine in 10 ml of methyl acetate. After stirring for 3 hours at room temperature, the resulting triethylamine hydrochloride is filtered off and the filtrate is concentrated by evaporation, yielding 0.9 g of 1-[2-chloro-4-fluoro-5-(1,2,3,4,5,6-hexahydro-1,3-dioxo-isoindolyl)-phenylthio]-cyclopropanecarboxylic acid methyl ester having a melting point of from +142° to +144° C.

1. stirringAfter stirring for 3 hours at room temperature
2. filtrationthe resulting triethylamine hydrochloride is filtered off
3. concentrationthe filtrate is concentrated by evaporation