Acrylonitrile → 2-(4-Chloro-2-fluorophenyl)-3-(2-cyanoethylthio)-2,3,4,5,6,7-hexahydro-1H-isoindol-1-one

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Reaction Steps

In 15 ml of dioxane was dissolved 2.1 g of 2-(4-chloro-2-fluorophenyl)-2,3,4,5,6,7-hexahydro-3-mercapto-1H-isoindole-1-on, and 1.5 g of acrylonitrile, together with several drops of triethylamine, was added, followed by heating at 85° to 90° C. for 6 hours. The reaction solution was concentrated under reduced pressure, and the residual, oily substance was purified by means of column chromatography with the use of silica gel (acetone:hexane=1:3), thereby producing 1.5 g of the subject compound in white crystals, m.p. 101°-103° C.

Provenance & Evidence