- Preparation method of 4-phenylmercaptothiophenol
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The invention provides a preparation method of 4-phenylthiolthiophenol. The preparation method comprises the following steps: performing a bromination reaction on diphenyl sulfide and a bromination reagent to prepare 4-bromodiphenyl sulfide, performing a
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Paragraph 0060-0066; 0069; 0070
(2020/07/15)
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- Preparation method for 4-thiophenyl-thiophenol
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The invention discloses a preparation method for 4-thiophenyl-thiophenol. The preparation method comprises the following steps: with diphenyl sulfide as a raw material, subjecting the diphenyl sulfideto a halogenation reaction so as to obtain 4-halogeno diphenyl sulfide; subjecting the 4-halogeno diphenyl sulfide to a mercapto substitution reaction so as to obtain 4-thiophenyl-thiophenol salt; and subjecting the 4-thiophenyl-thiophenol salt to acidification. The preparation method provided by the invention avoids the use of substances like benzenethiol with pollution to the environment, and realizes highly-efficient cyclic recovery and utilization of reaction materials, solvents, water, etc. The preparation method provided by the invention does not discharge organic wastes, waste acid andwaste alkaline water, and is a green process for synthesis of the 4-thiophenyl-thiophenol.
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Paragraph 0088; 0101; 0107; 0108
(2018/07/06)
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- MALDI-TOF/TOF CID study of poly(p-phenylene sulfide) fragmentation reactions
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A study involving the evaporation-grinding MALDI sample preparation method, MALDITOF/TOF CID, and Py-GC/MS is presented to examine the fragmentation mechanisms of poly(p-phenylene sulfide) (PPS). MALDI-TOF/TOF CID fragmentation studies yielded a wealth of information about the mass, structure (linear or cyclic), end-groups, and backbone modifications of the polymer. Additionally, Py-GC/MS experimental data are presented for comparison of the multimolecular free radical reactions in pyrolysis with the unimolecular fragmentation reactions of MS/MS.1,2 TOF/TOF CID results indicate that linear PPS undergoes random main chain fragmentation along the polymer backbone and preferentially fragments at bonds adjacent to dibenzothiophene and phenyl end-groups. Cyclic species produce fragment ions similar to linear species. However, the MS/MS precursor ions for cyclic PPS are, by far, the most intense peaks, while the precursor ions for linear species show relatively low intensity. CID fragmentation results are supported by Py-GC/MS data and are consistent with the proposed degradation mechanisms.
- Gies, Anthony P.,Geibel, Jon F.,Hercules, David M.
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experimental part
p. 952 - 967
(2011/10/08)
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- Efficient formation of aromatic thiols from thiomethylated precursors
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As a model study, a series of linear and branched p-phenylene and m- phenylene sulfides, functionalized by a thiomethyl group, were deprotected to thiols while using various alkyl thiolates at 160°C in DMF. Many complex aromatic thiols were obtained in al
- Pinchart, Alain,Dallaire, Carol,Van Bierbeek, Alain,Gingras, Marc
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p. 5479 - 5482
(2007/10/03)
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- Functionalized p-phenylene sulfides synthesis of new molecular wires
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Molecular wires containing p-phenylene sulfide units were synthesized. They could be used in material sciences and in supramolecular chemistry. Wires having 2 to 6 phenyl rings were functionalized at one end by an SH or SMe group, and at the other end, by an OH, OMe or OiPr groups. Formation of Ar-S bonds in the chain was achieved by Pd- or Cu-catalyzed couplings of aromatic thiols with aromatic halides. Conditions for a clean chemoselective deprotection of thiols from thiomethyl groups were developed.
- Pinchart, Alain,Dallaire, Carol,Gingras, Marc
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p. 543 - 546
(2007/10/03)
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