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离子液体[Hmim]BF_4中Pd(OAc)_2催化的苯乙烯二聚 被引量:1

Dimerization of Styrene in Ionic Liquid [Hmim]BF4 Catalyzed by Pd(OAc)2
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摘要 苯乙烯二聚对苯乙烯的聚合反应研究具有重要的理论意义.苯乙烯二聚常用的催化剂是强Bronsted酸或Lewis酸,其中硫酸的催化效率较高,但缺点是一般同时生成环状产物1-甲基-3-苯基二氢茚和相当数量的三聚体.T.Higashimura报道以苯作溶剂,用三氟醋酸或高氯酸等催化苯乙烯二聚,直链不饱和烯烃选择性达到90%[1].沸石和固体酸也可以用于催化苯乙烯二聚,且在反应中避免了使用有机溶剂,简化了后处理,但速度较慢.其中质子置换的酸性大孔沸石-β和-Y催化苯乙烯二聚的结果较好,但随着反应的进行沸石的催化效率下降明显,选择性降低,三聚体和其它齐聚物的比例增高[2].通过对改变酸性催化位点等的研究发现,影响二聚体选择性的不是酸强度,而是沸石孔径,后者限制了苯乙烯多聚,但是沸石表面的催化点则会导致多聚和二聚环化形成取代茚(表1).
出处 《华东师范大学学报(自然科学版)》 CAS CSCD 北大核心 2005年第1期136-138,共3页 Journal of East China Normal University(Natural Science)
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  • 1Higashimura T, Hiza M, Hasegawa H. Catalytic difference between oxo acids and metal halides in the cationic oligomerization of styrene [J]. Macromolecules, 1979, 12: 217~222.
  • 2Benito A, Corma A, Garcia H,et al. Dimerization of styrene catalyzed by acid 12-membered ring zeolites [J]. Applied Catal A:General, 1994, 116: 127~135.
  • 3Jiang Z, Sen A. Tailored cationic palladium ( Ⅱ ) compounds as catalysts for highly selective dimerization and polymerization of vinylic monomers: synthetic and mechanistic aspects [J]. Organometallics, 1993, 12: 1 406~1 415.
  • 4Dupont J, Souza R F, Suarez P A Z. Ionic liquid (molten salt) phase organometallic catalysis [J]. Chem Rev,2002, 102: 3 667~3692.
  • 5Bourbigou H, Magna L. Ionic liquids: perspectives for organic and catalytic reactions [J]. J Mol Catal A, Chemical, 2002, 182-183: 419~437.
  • 6Sheldon R. Catalytic reactions in ionic liquids [J]. Chem Commun, 2001, 23:2 399~2 407.
  • 7Welton R. Room-temperature ionic liquids. Solvents for synthesis and catalysis [J]. Chem Rev, 1999,99:2 071~2 084.
  • 8Zhu H P,Yang F,Tang J,et al. Bronsted acidic ionic liquid 1-methylimidazolium tetrafluoroborate: a green catalyst and recylable medium for esterification[J]. Green Chem,2003, 5:38~39.
  • 9Wu H H,Yang F,Cui P, et al. An efficient procedure for protection of carbonyls in Bronsted acidic ionic liquid[Hmim]BF4[J]. Tetrahedron Lett,2004,45(25) :4 963~4 965.

同被引文献8

  • 1Tsuchimoto,T.; Kamiyama,S.; Negoro,R.; Shirakawa,E.;Kawakami,Y.Chem.Commun.2003,852.
  • 2Higashimura,T.; Hiza,M.; Hasegwa,H.Macromolecules 1979,12,217.
  • 3Jiang,Z.; Sen,A.Organometallics 1993,12,1406.
  • 4Fuller,J.; Carlin,R.T.; Osteryoung,R.A.J.Electrochem.Soc.1997,144,3881.
  • 5Suarez,P.A.Z.; Einloft,S.; Dullius,J.E.; de Souza,R.F.; Dupont,J.Polyhedron 1996,15,1217.
  • 6Suarez,P.A.Z.; Einloft,S.; Dullius,J.E.; de Souza,R.F.;Dupont,J.J.Chim.Phys.1998,95,1626.
  • 7Holbrey,J.D.; Reichert,W.M.; Swatlosk,R.P.; Broker,G.A.; Pitner,W.D.; Seddon,K.R.; Rogers,R.D.Green Chem.2002,4,407.
  • 8Bonh(o)te,P.; Dias,A.P.; Papageorgiou,N.; Kalyanasundaram,K.; Gr(a)tzel,M.Inorg.Chem.1996,35,1168.

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