14503-51-6Relevant articles and documents
Catalytic Synthesis of Methylthiophenes
Mashkina,Khairulina
, p. 1794 - 1797 (2019/03/26)
The gas-phase reaction of dimethyl disulfide with thiophene over Co/HZSM-5 catalyst in a helium medium under atmospheric pressure at 250–350°C gave a mixture of mono-, di-, tri-, and tetramethylthiophenes with an overall selectivity of 94–96%.
Anodic Cyanation of Tetramethylthiophene
Yoshida, Kunihisa,Takeda, Kazusada,Minagawa, Kikuwo
, p. 1119 - 1120 (2007/10/02)
The electrooxidation of tetramethylthiophene in methanol containing sodium cyanide produced 2,5-dihydro-2,3,4,5-tetramethylthiophene-2,5-dicarbonitrile 1 (cis/trans = 0.7) and 2,5-dihydro-5-methoxy-2,3,4,5-tetramethylthiophene-2-carbonitrile 2 (cis/trans = 2.2) in 21 and 25percent yields respectively, together with a small amount of 2-methoxymethyl-3,4,5-trimethylthiophene 3.Treatment of the resultant 2,5-mixed adduct 2 with a small amount of acid induced elimination of a methanol molecule to give 2,5-dihydro-2,3,4-trimethyl-5-methylenethiophene-2-carbonitrile 4a.
Thiometalate complexes containing arene, thiophene, and cyclobutadiene coligandls. Are thiometalate clusters good models for desulfurization catalysts?
Howard, Kevin E.,Lockemeyer, John R.,Massa, Mark A.,Rauchfuss, Thomas B.,Wilson, Scott R.,Yang, Xiaoguang
, p. 4385 - 4390 (2008/10/08)
Reaction of [(p-cymene)RuCl2]2 and (PPh4)2WS4 gives [(p-cymene)RuCl]2WS4; the corresponding (C6Me6)Ru and (p-cymene)Os derivatives were also prepared. 1H NMR and IR data suggest that these compounds comprise pairs of pseudooctahedral metal centers bridged by the tetrahedral WS4. Related syntheses gave RuRe and Ru2PtW2 compounds from ReS4- and Pt(WS4)22-, respectively. The reaction of (p-cymene)RuCl2(PPh3) and (PPh4)2WS4 gave (p-cymene)RuWS4(PPh3), whose structure was verified by X-ray crystallography. (p-cymene)RuWS4(PPh3) crystallizes in the monoclinic space group P21/c (No. 14) with a = 9.254 (3) ?, b = 15.690 (8) ?, c = 20.102 (9) ?, β = 98.77 (3)°, and Z = 4. The analogous reaction of (tetramethylthiophene)-RuCl2(PPh3) and (PPh4)2WS4 results in the release of free tetramethylthiophene. In contrast, the p-cymene ligands were only labilized by further treatment of [(p-cymene)RuCl]2WS4 with WS42-. [(C4Me4)NiCl2]2 and WS42- give [(C4Me4)NiCl]2WS4 while (C4Me4)NiWS4(PMe2Ph) was prepared from (C4Me4)NiCl2(PMe2Ph). (C4Me4)NiWS4(PMe2Ph) crystallizes in the monoclinic space group Ia (No. 9) with a = 13.294 (6) ?, b = 25.519 (11) ?, c = 13.186 (6) ?, β = 97.44°, and Z = 8. Treatment of [(C4Me4)NiCl]2WS4 with (Me3Si)2S gives a polymeric sulfided material, which upon pyrolysis evolves tetramethylthiophene.