Polycarbonyl Heterocycles. Part VIII. A new Method for the Preparation of 4-Trifluorokbthylthio-3-Pyrazolite-5-Thione Derivatives from 1H-Pyrrole-2.3-Dione Derivatives via Nickel Complexes

Abstract

For the first time, 4-trifluoromethylthio-3-pyrazoline-5-thione derivatives 4 were synthesized by the reaction of trifluoromethylsulfenyl chloride with nickel complexes of β-aminothiocinnamic acid anilide 3. Complexes 2 and 3 were obtained from 5-aryl-4-thiocarbamoyl-1H-pyrrole-2,3-dione 1. The structure of products 4 has been elucidated on the basis of the elemental analysis and IR.MS. ¹H, ¹⁹F, ¹³C NMR spectra.