Alkyl sulphonic acid surface-functionalised silica as heterogeneous acid catalyst in the solvent-free liquid-phase addition of acetic acid to camphene

Dijs, Ivo J.; Ochten, Huibert L.F. van; Walree, Cornelis A. van; Geus, J.W.; Jenneskens, Leonardus W.

doi:10.1016/s1381-1169(02)00334-5

Cited by 56 publications

(46 citation statements)

References 52 publications

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“…New kind of acid solids have emerged in the last years based on sulfonic groups contained in mesostructured MCM-41 [15][16][17][18][19][20][21] and SBA-15 materials [22,23]. This sulfonated mesoporous silicas lead to materials with high surface area, narrow pore size distribution with high accessibility of acid centres and relative high acid strength.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the interaction by covalent bonds between the sulfonic groups and the mesostructured silica will prevent sulphur leaching. However, the use of this new kind of sulfonic catalyst has been mainly addressed to esterification and condensation reactions [15][16][17][18][19][20][21], being their application in organic reactions related with fine chemistry quite limited up to the moment [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

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Fries rearrangement of phenyl acetate over sulfonic modified mesostructured SBA-15 materials

Grieken

Melero

Morales

2005

Applied Catalysis A: General

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fries rearrangement of phenyl acetate over sulfonic modified mesostructured SBA-15 materials

Grieken

Melero

Morales

2005

Applied Catalysis A: General

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“…53,56,58,60 Building on the feasibility of using organic base and acid catalysts for this polymerization, an immobilized sulfonic acid is used as the catalyst in this work. Propylsulfonic acid moieties were immobilized on various silica supports (Scheme 1) and were evaluated in the ring-opening polymerization of -caprolactone, with a focus on potential catalyst recovery and reuse.…”

Section: Introductionmentioning

confidence: 99%

A Recoverable, Metal-Free Catalyst for the Green Polymerization of ε-Caprolactone

Wilson

Jones

2004

Macromolecules

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n-Propylsulfonic acid-functionalized porous and nonporous silica materials are evaluated in the ring-opening polymerization of -caprolactone. All catalysts allow for the controlled polymerization of the monomer, producing polymers with controlled molecular weights and narrow polydispersities. Polymerization rates are low, with site-time yields generally 1-3 orders of magnitude lower than metalbased systems. The catalysts are easily recovered from the polymerization solution after use and are shown to contain significant residual adsorbed polymer. Solvent extraction techniques are useful for removing most of the polymer, although the extracted solids are not effective catalysts in recycle experiments under the conditions used here. These new materials represent a green alternative to traditional metal-based catalysts, as they are recoverable and leave no metal residues in the polymer.

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“…Up to now, a number of approaches for preparing aromatic esters have been introduced [2,3]. The traditional esterifications usually proceed using mineral acids, e.g.…”

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confidence: 99%

HSO3-functionalized Brønsted acidic ionic liquids promote esterification of aromatic acid

2013

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Esterification of aromatic acid can be promoted via HSO 3 -functionalized Brønsted acidic ionic liquids (ILs). Under the optimum conditions, using 1-(3-sulfonic acid) propyl-3-methylimidazolium hydrogen sulfate ([MimC 3 SO 3 H][HSO 4 ]) and 1-(4-sulfonic acid) butyl-3-methylimidazolium hydrogen sulfate ([MimC 4 SO 3 H][HSO 4 ]) as dual solvent-catalysts, the conversion of esterification of aromatic acid was determined to be more than 90%, indicating that HSO 3 -functionalized ILs show much better catalytic ability than those of non-functionalized ionic liquids. The separation of desired product was easily performed by extraction with diethyl ether and these HSO 3 -functionalized ILs could be reused 7 times after vacuum drying. Our data represent an environmentally friendly method for the preparation of aromatic esters. aromatic esters, esterification, aromatic acids, alcohols, ionic liquids Citation:Zhou F Y, Xin B W, Hao J C. HSO 3 -functionalized Brønsted acidic ionic liquids promote esterification of aromatic acid.

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Alkyl sulphonic acid surface-functionalised silica as heterogeneous acid catalyst in the solvent-free liquid-phase addition of acetic acid to camphene

Cited by 56 publications

References 52 publications

Fries rearrangement of phenyl acetate over sulfonic modified mesostructured SBA-15 materials

Fries rearrangement of phenyl acetate over sulfonic modified mesostructured SBA-15 materials

A Recoverable, Metal-Free Catalyst for the Green Polymerization of ε-Caprolactone

HSO3-functionalized Brønsted acidic ionic liquids promote esterification of aromatic acid

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