Thietanes 1.3- dithiols

Sulfur is an interesting atom because of the specific characteristics of the simple substance and compounds containing sulfur. Further, their functions are indispensable for current technologies. Studies on sulfur compounds are valuable not only in chemistry but also in biochemistry as well. Many cyclic monomers containing sulfur such as cyclic disulfides, thiiranes, thietanes, and arene dithiols were reported to form cyclic polymers by the ring-opening polymerization. The natural source of cyclic polymers is believed to be liquid, elemental sulfur [177-179]. 

A novel method for synthesizing polythiaether macrocycles with Re cluster complex was proposed by Adams and coworkers [185]. This process involves catalysis by the Re complex rather than the stoichiometric displacement of dithiol or dithiolates by organic halides, and first example of a catalytic procedure for synthesis of polythiaether macrocycle using thietanes. The macro-cyclic products formed are shown in Fig. 56. 

Thian 3-Acetyl-2-oxo- VII/2a, 501 Thietan 3,3-Diethyl-2,4-dioxo- Ell, 1547 [aus 4,4-(C2H5)2 — 3,5-dioxo-l,2-dithiol... 

Thiete structures have been suggested as fragmentation products in the mass spectra of a thietane fused to a 3-lactam, an ortho disulfide of a thiolbenzoate ester, -propanethiol, thiirane carboxylic acid esters, isothiazoles, thiazoles, 1,3-dithiole 2-thiones, 1,3-dithiolene-2-ones, S-ethyl thio-benzoate, and thianaphthene sulfones. Tetramethylthiete may have been formed on thermolysis of the p-toluenesulfonyl-hydrazone of 2,2,4,4-tetramethyl-3-thietanone. " Thiete 2-thione may be an intermediate in the decomposition of 1,2-ditholium salts by the action of bases. " 2,2-Diphenyl-2H-thiete is suggested as an intermediate in the reaction of diphenyldiazomethane with 1,2,3-benzo-thiadiazole which yields 9-phenylthioxanthene and three other products. ... 

Keywords Azepines Benzimidazoles Benzofurans Benzopyranones Benzothlazoles Benzothiophenes Benzoxazoles Benzoxocanes DIoxepanes Dioxocanes DIoxolanes Dithiiranes Dithioles Furans Imidazoles Indazoles Indoles Indollnes Indollzines Isoquinolines Isoxazoles Isoxazolines Oxazines Oxazoles Oxepanes Oxiranes Pyrazines Pyrazoles Pyridazines Pyridines Pyrimidines Pyrroles Pyrrolidines Pyrrolines Pyrrolizines Quinolines Thietanes Thiophenes Triazoles... 

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