摘要:
The reaction of N,N'-bis(dithiocarboxy)piperazine with acetylenic ketones and methyl propiolate gave N,N'-bis(acylvinyldithiocarbo)- and N,N'-bis(methoxycarbonylvinyldithiocarbo)piperazines. Heating the compounds obtained with perchloric acid leads to intramolecular cyclization with the formation of N,N'-bis[2-acyl(methoxycarbonyl)methyl-1,3-dithietanium]piperazine perchlorates.