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Heteropolyacid-catalyzed dimerization of α-methylstyrene; on the efficiency and selectivity dependence

Paper ID Volume ID Publish Year Pages File Format Full-Text
51723 46851 2011 3 PDF Available
Title
Heteropolyacid-catalyzed dimerization of α-methylstyrene; on the efficiency and selectivity dependence
Abstract

In the presence of catalytic amounts of a Keggin (H3PW12O40), Wells–Dawson (H6P2W18O62) or Preyssler (H14NaP5W30O110) heteropolyacid, α-methylstyrene (1) leads to dimers. The efficiency and the selectivity toward 2,4-diphenyl-4-methyl-1-pentene (2), 2,4-diphenyl-4-methyl-2-pentene (3) and 1,1,3-trimethyl-3-phenylindan (4) depend on the reaction temperature and the nature of both the catalyst and the solvent. Thus, 2, 3 and 4 can be produced in 45%, 50% and 97% yields, respectively.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch Highlights► The dimerization of α-methylstyrene catalyzed with HPAs is efficient. ► The selectivity is toward the production of the linear dimers or the cyclic dimer. ► Temperature and the nature of both the catalyst and solvent are important.

Keywords
Heteropolyacids; Catalysis; Dimerization; α-Methylstyrene; 1,1,3-Trimethyl-3-phenylindan; 2,4-Diphenyl-4-methyl-1-pentene
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Heteropolyacid-catalyzed dimerization of α-methylstyrene; on the efficiency and selectivity dependence
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 14, Issue 1, 25 October 2011, Pages 89–91
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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