Hydrochloric Acid → 4-hydroxymethyl-3-(2,3,4-trifluorophenyl)-2(3H)-thiazolethione

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Reaction Steps

3-Acetoxy-2-oxopropyl N-(2,3,4-trifluorophenyl)dithiocarbamate (1.0 g) prepared in the previous Reference Example was added to ethanol (15 ml) and thereto 10% solution of hydrogen chloride in ethanol (5 ml) was added and the mixture was refluxed for one hour and 30 minutes. After the solvent was distilled off under reduced pressure, cooled water was added to the residue and the resultant was extracted with chloroform. After the extract was washed with a NaCl solution and dried over anhydrous magnesium sulfate, the solvent was distilled off under reduced pressure. The residue was recrystallized from a mixed solvent of hexane - ethyl acetate to give the title compound (0.56 g) as pale yellow crystals, m.p. 113°-116° C.

Provenance & Evidence