HCID 20541555, compound → HCID 12884281, compound

Participants

Reaction Steps

A solution of 0.4 parts of N,N-dicyclohexylcarbodiimide in 5 parts of dioxane was added at once to a solution of 0.6 parts of 2-(4-chloro-2-fluorophenylaminocarbonyl)-1-cyclohexene-1-carboxylic acid in 5 parts of dioxane to form a slurry. After stirring the slurry for 1 hour, the resulting solid 1,3-dicyclohexylurea was filtered. The filtrate was evaporated under reduced pressure of 300 mm. Hg at 25° C to a yellow, semisolid residue from which 0.27 parts of 3-(4-chloro-2-fluorophenylimino)-4,5,6,7-tetrahydro-1-(3H)-isobenzofuranone melting at 81°-84° C was isolated after fractionation by high pressure liquid chromatography.

Provenance & Evidence