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Open AccessArticle

Alkylation of Methyl Linoleate with Propene in Ionic Liquids in the Presence of Metal Salts

Dipartimento di Farmacia, Università di Pisa, via Bonanno 33, Pisa 56126, Italy
ENI Downstream R & D, Development Operations and Technology, S. Donato Milanese (Mi) 20097, Italy
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Jason P. Hallett
Molecules 2015, 20(12), 21840-21853;
Received: 5 November 2015 / Revised: 20 November 2015 / Accepted: 27 November 2015 / Published: 7 December 2015
(This article belongs to the Special Issue Ionic Liquids in Organic Synthesis)
Vegetable oils and fatty acid esters are suitable precursor molecules for the production of a variety of bio-based products and materials, such as paints and coatings, plastics, soaps, lubricants, cosmetics, pharmaceuticals, printing inks, surfactants, and biofuels. Here, we report the possibility of using Lewis acidic ionic liquids (ILs) to obtain polyunsaturated ester dimerization-oligomerization and/or, in the presence of another terminal alkene (propene), co-polymerization. In particular, we have tested the Lewis acidic mixtures arising from the addition of a proper amount of GaCl3 (Χ > 0.5) to two chloride-based (1-butyl-3-methylimidazolium chloride, [bmim]Cl, and 1-butylisoquinolium chloride, [BuIsoq]Cl) or by dissolution of a smaller amount of Al(Tf2N)3 (Χ = 0.1) in 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [bmim][Tf2N]. On the basis of product distribution studies, [bmim][Tf2N]/Al(Tf2N)3 appears the most suitable medium in which methyl linoleate alkylation with propene can compete with methyl linoleate or propene oligomerization. View Full-Text
Keywords: ionic liquid; metal salt; methyl linoleate alkylation ionic liquid; metal salt; methyl linoleate alkylation
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Pomelli, C.S.; Ghilardi, T.; Chiappe, C.; De Angelis, A.R.; Calemma, V. Alkylation of Methyl Linoleate with Propene in Ionic Liquids in the Presence of Metal Salts. Molecules 2015, 20, 21840-21853.

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