- An efficient synthesis of thiobis(benzenethiol)
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4,4'-Thiobis(benzenethiol) is prepared in a simple way by reduction of 4,4'-thiobis(benzenesulphonylchloride) by zinc granulate amalgam in the medium of sulphuric acid.
- Wejchan-Judek,Perkowska-Spiewak
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- Method for synthesizing 4,4'-thiodibenzenethiol
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The invention discloses a method for synthesizing 4,4'-thiodibenzenethiol. The method comprises the following steps: by taking phenyl sulfide as an initial raw material, reacting with chlorosulfonic acid so as to obtain 4,4'-bis(chlorosulfonyl)phenyl sulfide; reducing with glacial acetic acid so as to obtain 4,4'-bis(ethanethioate)phenyl sulfide under the actions of red phosphorus and iodine; hydrolyzing so as to obtain crude 4,4'-thiodibenzenethiol; and finally, recrystallizing, thereby obtaining the high-quality 4,4'-thiodibenzenethiol. According to the method disclosed by the invention, raw materials are easily available, the process is advanced and the industrial production is convenient.
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Paragraph 0033; 0038; 0039; 0040; 0041; 0044; 0045; 0048
(2017/08/29)
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- Preparation method of 4,4'-dimercaptodiphenylsulfide
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The invention relates to a preparation method of 4,4'-dimercaptodiphenylsulfide. The method comprises the following steps: by using diphenylsulfide as an initial raw material, carrying out halogenating reaction to obtain 4,4'-dihalodiphenylsulfide, carrying out reaction on the 4,4'-dihalodiphenylsulfide and a vulcanizing reagent, and carrying out hydrolysis to obtain the 4,4'-dimercaptodiphenylsulfide. The method provided by the invention is simple to operate, has the advantages of higher product purity, high safety of the reaction process, and low cost, and is suitable for industrial production. More importantly, the method provided by the invention avoids using abundant strong acids in the conventional preparation method, and prevents the abundant wastewater generated in the production process from severely polluting the environment.
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Paragraph 0042; 0043
(2016/12/01)
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- Synthesis, acidic and basic properties of thiols and sulfinic acids from the series of diphenyl bridging compounds
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A series of dithiols and disulfinic acids belonging to diphenyl bridging compounds was prepared and identified. The conditions of reduction for the corresponding sulfonyl chlorides were optimized resulting in production of the target compounds in 85-95% yields. The acidity constants of the compounds obtained were measured. A correlation between pKa and δSH, was established for thiols. Therewith the dissociation constants of thiols are readily evaluated by the chemical shift of the thiol group proton.
- Alov,Nikiforov,Novikov,Kobylinskii,Moskvichev,Kryukova,Yasinskii,Budanov
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p. 1160 - 1164
(2007/10/03)
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