✍ Scribed by Ryu Sato; Masako Okanuma; Shin-ichi Chida; Satoshi Ogawa
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3,CDihydro-1,2,5_benzotrithiepin, 6H-2,3-dihydro-1,4,5benzotrithiocin, and these derivatives were conveniently synthesized in good yields upon treating 1,2benzenedithiol and 2-mercaptomethylbenzenethiol with various thhhaues in the presence of methylamine in a polar solvent. Recently, the characteristic chemical properties of cyclic polysulfides have attmcted wide attention in the field of organosulfur chemistry.l We have also reported new methods for the synthesis of benzopemathiepin2 and the related compound.3 Furthermore, we have found many reactions for providing some heterocycles from Such cyclic polysulfides.4 For example, a direct formation of 1.2.5benzotrithiepins 35 and 1.4.5~henzo t&hiocin 5.6 which are characterized by containing three different kinds of sulfur atoms as unsymmetrical
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## Abstract Reaction of 1‐(chloromethylthio)‐1‐alkynes (RCCSCH~2~Cl, R alkyl or phenyl) with an alkali metal sulfide, selenide or telluride gives 4‐substituted 1,3‐dithioles together with the corresponding 1,3‐thiaselenoles and 1,3‐thiatelluroles in good yields. The compounds RCCSCH~2~Cl ca
## Abstract For Abstract see ChemInform Abstract in Full Text.