- Alkylation of methyl linoleate with propene in ionic liquids in the presence of metal salts
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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 (X > 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 (X = 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.
- Pomelli, Christian Silvio,Ghilardi, Tiziana,Chiappe, Cinzia,De Angelis, Alberto Renato,Calemma, Vincenzo,Hallett, Jason P.
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Read Online
- Metal- And solvent-free synthesis of aniline- And phenol-based triarylmethanes: Via Br?nsted acidic ionic liquid catalyzed Friedel-Crafts reaction
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A beneficial, scalable and efficient methodology for the synthesis of aniline-based triarylmethanes has been established through the double Friedel-Crafts reaction of commercial aldehydes and primary, secondary or tertiary anilines using Br?nsted acidic ionic liquid as a powerful catalyst, namely [bsmim][NTf2]. This protocol was successfully performed under metal- and solvent-free conditions with a broad range of substrates, giving the corresponding aniline-based triarylmethane products in good to excellent yields (up to 99%). In addition, alternative aromatic nucleophiles such as phenols and electron-rich arenes were also studied using this useful approach to achieve a diversity of triarylmethane derivatives in high to excellent yields. This journal is
- Jaratjaroonphong, Jaray,Saeeng, Rungnapha,Senapak, Warapong,Sirion, Uthaiwan,ponpao, nipaphorn
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p. 22692 - 22709
(2021/07/21)
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- Bronsted acid ionic liquid catalyzed formation of pyruvaldehyde dimethylacetal from triose sugars
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A series of sulfonic acid functionalized ionic liquids (SO 3H-ILs) have been synthesized, characterized and investigated as catalysts for the conversion of the triose sugars, 1,3-dihydroxyacetone (DHA) and glyceraldehyde (GLA), to pyruvaldehyde dimethylacetal (PADA) in methanol. Depending on the reaction conditions and the applied SO3H-ILs a good yield of up to 52% of PADA was obtained. Under identical reaction conditions the derivative of PADA, 1,1,2,2-tetramethoxy propane (TMP), could be obtained in yields up to 49% using another SO3H-IL.
- Saravanamurugan, Shunmugavel,Riisager, Anders
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- Hydrodeoxygenation of lignin-derived phenols into alkanes by using nanoparticle catalysts combined with Brensted acidic ionic liquids
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Oxy-gone in a tandem: A catalytic system composed of metal nanoparticles (NPs) and a functionalized Brensted acidic ionic liquid (IL), both of which are immobilized in a nonfunctionalized IL, is highly efficient in upgrading lignin-derived phenolic compounds into alkanes; the hydrogenation and dehydration reactions take place in tandem. Figure Presented
- Yan, Ning,Yuan,Dykeman, Ryan,Kou, Yuan,Dyson, Paul J.
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supporting information; experimental part
p. 5549 - 5553
(2010/10/03)
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- DEHYDRATION PROCESS
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A process for producing an olefin and/or an ether is described, which comprises heating an alcohol in the presence of an acidic ionic compound which exists in a liquid state at a temperature of below 150°C.
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Page/Page column 13
(2008/06/13)
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