- Preparation method of alkyl-substituted thiophenol
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The invention provides a preparation method of alkyl-substituted thiophenol. Alkyl-substituted benzene sulfonyl chloride is used as a raw material, a mixed solvent and acid are regarded as a reactionsystem, and under synergistic catalysis of metal and organophosphorus and reduction action of reductive salt, the alkyl-substituted thiophenol is obtained. The preparation method of the alkyl-substituted thiophenol has a high industrialized application value, an Iron powder reduction technology can be effectively replaced, the defects that an organic reducing system is high in cost, high in toxicity, difficult in post-treatment and the like are overcome, inorganic salt which is cheap and easy to get is used as a main reducing agent, through the synergistic catalysis action, the reducibility ofthe inorganic salt is significantly improved, the reaction yield stabilizes at 92% or above, and a technology has the characteristics of being simple and convenient to operate, short in production cycle, low in cost, clean, environmentally friendly and suitable for industrialized production.
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Paragraph 0019-0020; 0033-0034
(2018/12/13)
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- A simple, fast and chemoselective method for the preparation of arylthiols
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An efficient and convenient method for the synthesis of arylthiols by reaction of sulfonyl chlorides with triphenylphosphine in toluene is reported.
- Bellale, Eknath V.,Chaudhari, Mahesh K.,Akamanchi, Krishnacharya G.
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experimental part
p. 3211 - 3213
(2010/03/01)
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- Ring inversion dynamics of derivatives of thianthrene di- and tetraoxide
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The ring inversion barrier for thianthrene tetraoxide was determined by making use of the variable temperature 13C NMR spectra of the 2,7-diisopropyl derivative (ΔG? = 6.5 kcal mol-1). The barrier is lower than that measured for a trans thianthrene dioxide derivative (ΔG? = 9.35 kcal mol-1). These results agree well with ab initio theoretical predictions.
- Casarini, Daniele,Coluccini, Carmine,Lunazzi, Lodovico,Mazzanti, Andrea
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p. 6248 - 6250
(2007/10/03)
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- REAGENTS FOR 2-TETRAHYDROTHIENYL AND 2-TETRAHYDROTHIOPYRANYL CATIONS
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O- and S-2-tetrahydrothienyl and 2-tetrahydropyranyl ethers were obtained by reaction of primary alcohols, phenols, and arenethiols with 1-p-toluenesulphonyliminotetrahydrofuran and 1-p-toluenesulphonyliminotetrahydrothiopyran in the presence of sodium hydride in dimethylformamide or by acid-catalysed transacetalysation of 2-methoxytetrahydrothiophene and 2-methoxytetrahydrothiopyran with secondary alcohols and arenethiols.
- Giovani, Elena,Napolitano, Elio,Pelosi, Paolo
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p. 257 - 260
(2007/10/02)
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- Novel copolymers and superoxide dismutase modified with said copolymers
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Described are copolymers comprising the copolymer--constituting units characterized in the claims and having an average molecular weight of 400 to 20,000. Furthermore superoxide dismutase (SOD) derivatives are described which can be obtained by modification with the above copolymers and have a single chemical structure, retain most of the enzymatic activity of SOD and exhibit a much prolonged plasma half-life. Therefore, they are useful as medicinal chemicals.
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- Production of S-aryl S-alkyl dithiocarbonates
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An S-aryl S-alkyl dithiocarbonate is prepared by pyroltically isomerizing an O-aryl S-alkyl dithiocarbonate at a temperature in the range 150°-600° C. The reaction product may be hydrolyzed to form an arenethiol or may be further reacted with an alcohol in the presence of a basic catalyst to form an aryl thioether.
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- Theoretical and Spectroscopical Investigations of Indigo Dyes, XXII. - Preparations of 5,5'- and 6,6'-Dialkylated Indigo Dyes
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The manifolded applicabilities of indigo dyes are strongly restricted by the low solubility of most of their representatives.We describe in this paper the preparation of a series of dialkylated indigos 1, thioindigos 2, dyes of the cibaviolett-type 3, and of the corresponding vinylogues 4, 5, and 6 by different synthetic methods.Some of the prepared compounds show a remarkable solubility and can be used for spectroscopic measurements even in non-polar solvents.
- Meier, Helmut,Luettke, Wolfgang
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p. 1303 - 1333
(2007/10/02)
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