17249-80-8Relevant articles and documents
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Perevalova et al.
, (1978)
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Competitive reactivities of vinylthiyl radicals thermally generated from haloethylenes and hydrogen sulfide
Deryagina,Sukhomazova,Levanova
, p. 662 - 666 (2007/10/03)
Acetylene and its derivatives have been used for the first time as "traps" for vinylthiyl radicals generated in situ from hydrogen sulfide and haloethylenes in gas-phase processes. The competitive reactivity of the vinylthiyl radicals has been studied at 500-570 °C in the presence of two chemical "traps." The efficiency of chemical "traps" for the vinylthiyl radicals decreases in the following sequence: HC≡CPh > HC≡CH > MeC≡CH > CH2=CHCl. Acetylene is a more efficient "trap" for the vinylthiyl radicals than 1,2-dichloroethylene, from which they have been generated. The β-phenylvinylthiyl radicals generated during cothermolysis of halostyrene-hydrogen sulfide-acetylene component ternary systems undergo first of all intramolecular ring closure to give benzothiophene, which is a thermodynamically favorable system; the reaction of these radicals with acetylene and its derivatives occurs much more slowly than heterocyclization. Phenylacetylene is a more efficient "trap" than acetylene. α-Phenylvinylthiyl radicals mostly react with acetylene to yield 2-phenylthiophene.
Herstellung von β-Halogenthiophenen durch Isomerisierung von α-Halogenthiophenen an Zeolithkatalysatoren
Dettmeier, Udo,Eichler, Klaus,Kuehlein, Klaus,Leupold, Ernst Ingo,Litterer, Heinz
, p. 470 - 471 (2007/10/02)
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