N,N'-BIS-SUBSTITUTED IMIDAZOLIN-2-THIONES AND METHOD OF PREPARING SAME

摘要

N,N'-BIS-SUBSTITUTED IMIDAZOLIN-2-THIONES AND METHOD OF PREPARING SAME The present invention relates to novel derivatives of imidazolin-2-thione and a method of preparing same. These no vel compounds comprise N,N'-bis-substituted imidazoiin-2-thi ones of the formula: (I) wherein R1 is (II) R2 is hydrogen or methyl. The method of preparing said compounds according to the present invention comprise reacting imidazolin-2-thione with formaldehyde and a compound of the formula: (III) wherein R2 is hydrogen or methyl, at the molar ratio therebetween of 1:2:2 respectively in an aqueous medium or in a medium of polar organic solvents at a temperature ranging from 20 to 80.degree.C. The method according to the invention makes it possible to obtain the desired produce at a high yield (up to 93% of the theoretical value). Said products may be widely employed in rubber industry as efficient accelerators of vulcanization of rubber mixes (vulcanization time is 10-15 minutes), as corrosion inhibitors for nonferrous metals, as flotation reagents for extraction of nonferrous metals from waste waters and as herbicides and insecticides in agriculture.