The article is a concise analysis of the author's group's systematic exploration of the scope and potential of a new general approach to the synthesis of sulfur-rich polyconjugated polymers by direct dehydrogenative sulfurization of common polymers (polyethylene, polyacetylene, polystyrene, polyvinylpyridine, polydiethylsiloxane) with elemental sulfur. The deeply sulfurized polymers thus formed, consist of functionalized redox-active polyene, polysulfide and polycondensed thiophene entities and related blocks, the ratio of which depends on the reaction conditions and starting polymer structure. This paves the simplest way to electroactive and conducting materials with tailor-made properties, which may find application (among others) as principal cathode components of advanced electrochemical energy storage devices, e.g. lithium rechargeable batteries.
This review summarizes recent publications about sulfenyl chlorides including aspects of their methods of preparation, chemistry and mechanisms with carbon-carbon double bonds and disulfides 85 2. Special attention has been paid to triphenylmethanesulfenyl chloride 2 and the thio 3 and dithio homolog 4.
The present review constitutes the author's chemical autobiography with 239 references to his papers, patents, and books dating from 1960 to 2003.
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Sulfur-containing compounds are some of the strongest odorants. The perception of their odors often depends on their concentration as well as on their chemical, diastereo- and enantiomeric purity. Even if present only in trace amounts, they may change the overall olfactory impressions of fragrant mixtures, which makes the art of composing perfumes both difficult as well as rewarding. In the fruity area, compounds such as 8-mercapto-p-menthan-3-one (37), p-menthene-8-thiol (59), 3-mercapto-hexanol (62) and Oxane® (100) have gained unimpeachable superiority in terms of imparting natural fruitiness and freshness which transmits also into other olfactory domains. With regard to fragrance chemistry, the article gives a review of the particular odor properties, structure-odor correlations, biological significance and of the biochemical generation of sulfur-containing odorants.
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This review covers the synthesis, reactions, and biological activity of heterocyclic annelated isothiazol-3(2H)- ones and a new series of 12-benzisothiazol-3(2H)-ones of the last ten years. Isothiazolo[5,4-b]pyridine-3(2H)-ones have been reported by oxidative cyclization of 2-mercapto-3-pyridinecarboxamides, 2,2-dithio- and 2,2-trithiobis(3-pyridinecarboxamides) and by cyclocondensation of 2-thiosubstituted 3-pyridinecarboxa- mides. The isomeric isothiazolopyridine-3(2H)-ones, pyrimidine-3(2H)-ones and the thienoisothiazoL3(2H)- ones have been described. I, 2-Benzisothiazol-3(2H)-onesand their heterocyclic bioisosteric derivatives have been reported to possess high antifungal and antibacterial activities.
The literature on the thermal reactions of tetra- and hexavalent sulfur compounds are summarized and analyzed. The bibliography contains 305 references for the period 1950–2000.
Abstract This review deals with methods for the synthesis, reactions and biological activity of isothiazol-3(2H)-ones. Monocyclic isothiazol-3(2H)-ones have been reported by oxidative cyclization of thiomalonamide derivatives, amides of 3-thionocarboxylic acids and 4,5-dithiaoctanediamides; by cyclocondensation of β-thiosubstituted propenamides and ring contraction of 1,4-thiazepines. Isothiazol-3(2H)-ones and their tautomer OH-forms have been investigated. Isothiazol-3(2H)-ones and their metal salt complexes are potent industrial microbiocides because of antifungal and antibacterial properties. Key Words: Isothiazol-3(2H)-ones S-oxides S-dioxides4,5-dithiaoctanediamides O/N-functionalizationMicrobiocidesToxicityGABA receptor
The present review deals with the recent reactions of thioaldehydes and thioketones. The references cover the reaction with dienes, dienophiles, 1,3-dipoles, and diplarophiles mainly from 1995.
The diversity of functions of organic sulfur compounds in the most important fields of silver halide photography is reviewed. While organic sulfur compounds of the lower oxidation states (−2 to 0) are discussed mainly as important ligands for silver ions in all stages of the photographic process, those of the higher oxidation states (+2 to +4) are shown to be useful for modifying the reactivity and physical properties of auxiliary and supplementary components.
This review article includes a recent development in the chemistry of bridgehead nitrogen thiazolpoyrimidines. Synthetic approaches with respect to the four different ring systems were reported. Chemical reactivity, experimental structural methods, biological activity, basicity of thiazole heterocyclic compounds, and applications were also reported. This review includes 126 references.
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Abstract This review covers some of the methods for preparation of sulfonic acids reported recently. Phenols can be sulfonated directly using concentrated aqueous sulfuric acid. The products obtained can be analysed by several methods, e.g., HPLC and 1H NMR spectroscopy. Dihydroxy and dimesyloxynaphthalenes have been sulfonated by the use of SO3. The sulfonation process was found to be dependent on the reaction conditions and the stoichiometry. Sulfur trioxide alone can be used as a sulfonating reagent to produce sulfonic acids, but sulfur trioxide-base complexes have been found to be more convenient sulfonating reagents, with the advantage that they are easier to handle. For example, (S)-3-amino-2-oxoazetidine-1-sulfonic acid can be obtained in good yield by the use of a sulfur trioxide-base complex. Sulfur trioxide can be inserted into the metalcarbon bond of various organolithiums and Grignard reagents to produce organic sulfonic acids in high yields. Key Words: Sulfonic acidsSulfonationSulfur trioxideConcentrated aqueous sulfuric acidOrganolithiums(S)-3-amino-2-oxoazetidine-1-sulfonic acid
Data concerning synthesis of thiophene, alkylthiobutenynes and esters of dithiocarbamic acids and related compounds with utilization of diacetylene are briefly summarited. Key Words: DiacetyleneThiopheneThiolsAlkylthiobutenynesLiquid ammoniaKetonesCarbon disulfideEsters of dithiocarbamic acids
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
