Selective acylation of 1,3-dibenzyloxybenzene to 3,5-dibenzyloxyacetophenone over cesium modified dodecatungstophosphoric acid (DTP) on clay

Yadav, Ganapati D.; Badure, Omprakash V.

doi:10.1016/j.apcata.2008.05.026

Cited by 8 publications

(2 citation statements)

References 28 publications

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“…For green chemistry, moisture-insensitive and easily handled solid acid catalysts should be developed [28]. A variety of solid catalysts have been employed for the Friedel-Crafts acylation reactions, including zeolites [29][30][31], hybrid zeolitic-mesostructured materials [32], mesoporous superacid catalyst [33], modified clay [34,35], fly ash-supported cerium triflate [36], metal triflate loaded SBA-15 [37], Ga/SBA-15 supported on carbon nanofibers composite [38], mesoporous sulphated zirconia [39], mesoporous sieve AlKIT-5 [40], nanostructural zinc oxide hollow spheres [41], and silica gel supported aluminium trichloride [42]. In this work, we report the utilization of ZIF-8 as a heterogeneous catalyst for Friedel-Crafts acylation.…”

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confidence: 99%

A Zeolite Imidazolate Framework ZIF-8 Catalyst for Friedel-Crafts Acylation

Nguyen¹,

Le²,

Phan³

2012

Chinese Journal of Catalysis

111

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confidence: 99%

A Zeolite Imidazolate Framework ZIF-8 Catalyst for Friedel-Crafts Acylation

Nguyen¹,

Le²,

Phan³

2012

Chinese Journal of Catalysis

111

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“…As part of our ongoing research work on nanocrystalline metal oxides catalysts − and application of heterogeneous catalysts in various organic transformations, − we herein report the preparation of nanocrystalline sulfated titania (NCST) by the sol–gel method using poly(vinyl alcohol) (PVA) as a green template. Furthermore, the NCST catalyst was investigated in comparison with fuel lean sulfated zirconia (FLSZ), UDCaT-5, 20%Cs 2.5 H 0.5 PW 12 /K-10 clay, Hβ-zeolite, and titania as an efficient, reusable, solid acid catalyst for the synthesis of β-amino alcohols from epoxides and aromatic amines providing high yields and selectivity under mild conditions (Scheme ).…”

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confidence: 99%

Template Assisted Synthesis of Nanocrystalline Sulfated Titania: Active and Robust Catalyst for Regioselective Ring Opening of Epoxide with Aniline and Kinetic Modeling

Nakhate

Doke

Yadav

2016

Ind. Eng. Chem. Res.

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The regioselective ring opening of epoxides with aniline affording β-amino alcohols is commercially important. A variety of heterogeneous catalysts such as fuel lean sulfated zirconia (FLSZ), UDCaT-5, 20%Cs 2.5 H 0.5 PW 12 /K-10 clay, Hβ-zeolite, nanocrystalline sulfated titania (NCST), and titania were evaluated in the reaction of epichlorohydrin with aniline. A nanocrystalline sulfated titania (NCST) catalyst, the most active and selective, was prepared by the sol−gel method using poly(vinyl alcohol) (PVA) as a green template and functionalized using sulfuric acid. The sulfate content was in the range 4.1% (w/w). It was well characterized using TEM, FT-IR, XRD, NH 3 -TPD, N 2 -BET surface area, and TGA. The effects of various parameters such as speed of agitation, molar ratio, catalyst loading, and temperature using the NCST catalyst were investigated in the reaction of epichlorohydrin with aniline to achieve good yields and excellent regioselectivity at 60 °C and 0.01 g/cm 3 catalyst loading. The catalyst was effectively recycled for five consecutive cycles without any significant loss in its activity. Furthermore, a reaction mechanism was proposed to deduce a kinetic model which was validated against experimental data. The entire process is green. The protocol was extended to the reaction of several epoxides and amines over NCST to make corresponding β-amino alcohols.

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Review of SO 2− 4 /M x O y solid superacid catalysts

Liao

2009

Front. Chem. Eng. China

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Some metal oxides modified with sulfate ions form highly acidic or superacidic catalysts. SO 2 -4 =M x O y solid superacid catalysts, play a vital role in more and more fields such as organic synthesis, fine chemicals, pharmaceuticals, and means for strengthening environmental safeguards. This review highlights the recent development of solid superacid catalysts based on SO 2 -4 =M x O y , including synthesis method, characterization of acid sites and acid strength, and applications.

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Selective acylation of 1,3-dibenzyloxybenzene to 3,5-dibenzyloxyacetophenone over cesium modified dodecatungstophosphoric acid (DTP) on clay

Cited by 8 publications

References 28 publications

A Zeolite Imidazolate Framework ZIF-8 Catalyst for Friedel-Crafts Acylation

A Zeolite Imidazolate Framework ZIF-8 Catalyst for Friedel-Crafts Acylation

Template Assisted Synthesis of Nanocrystalline Sulfated Titania: Active and Robust Catalyst for Regioselective Ring Opening of Epoxide with Aniline and Kinetic Modeling

Review of SO 2− 4 /M x O y solid superacid catalysts

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