Novel Route to 2,6-Diphenyl-1,4-dithiine

Metal carbonyl-promoted reactions of ferrocenylacetylene with sulfur to form thiophene, dithiine, thioketone and vinylthioketone derivatives

“…For instance, dithieno [3,4-b,3 0 ,4 0 -e]- [1,4]dithiine is used as a monomer to synthesize polymers suitable for anodically and cathodically colouring applications [2] and some dihydrodithiines have been identified as novel organic conductors [3]. Known methods of synthesis of dithiines include the hydrothiolysis of diphenacylsulfide to form 2,6-diphenyl-1,4-dithiine [4]. Refluxing 1,8-diketones in toluene with Lawesson's Reagent is reported to yield 1,4-dithiines [5].…”