177586-38-8Relevant articles and documents
Analysis of benzannelated thiophene derivatives by negative-ion chemical ionization using oxygen as a reagent gas
Drabner,Budzikiewicz
, p. 893 - 899 (1995)
Under the conditions of negative-ion chemical ionization with O2 as a reagent gas [NCI(O2)], thiophene derivatives suffer surface-catalysed oxidative degradation with subsequent ionization of the resulting species. These degradation reactions are to some extent structure specific and thus may be used for the localization of rings and/or substituents. It is advisable, however, to combine NCI(O2) with either electron impact ionization or positive ion CI. The latter ionization methods yield abundant M+. ions but hardly any structure-specific fragments, whereas with NCI(O2) the determination of the molecular mass may be difficult owing to the competing oxidation reactions.
Palladium catalysis based one-pot synthesis method for DBTs (dibenzothiophenes)
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Paragraph 0041-0043; 0048-0050, (2020/05/12)
The invention discloses a palladium catalysis based one-pot synthesis method for DBTs (dibenzothiophenes). An inorganic base is added to an N,N-dimethylacetamide solution, with a palladium catalyst/ligand as a catalysis system, o-bromoiodobenzene derivatives or iodobenzene derivatives and thiophenol derivatives taken as raw materials are subjected to a reaction in nitrogen atmosphere, and DBTs areobtained through separation. The simple, economical and easily available raw materials are taken as substrates, all-position-substituted DBTs are synthesized on the basis of palladium catalyzed cascade reaction, and DBTs have great application prospect in medical synthesis intermediates and organic optoelectronic material science.
Iron-catalyzed carbon–sulfur bond formation: Atom-economic construction of thioethers with diaryliodonium salts
Liu, Li,Qiang, Jian,Bai, Shuhua,Li, Yang,Li, Jian
, p. 2365 - 2371 (2017/09/30)
Diaryliodonium salts are characterized by poor atom economy with the formation of one equivalent of an iodoarene as waste. We have developed an atom-economic iron-catalyzed protocol for the synthesis of a variety of thioethers with diaryliodonium salts. Not only cyclic diaryliodonium salts but also linear diaryliodonium salts were found to perform well in the reactions.