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(searched for: doi:10.5155/eurjchem.1.4.385-387.90)
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Sakshi Kabra Malpani, Deepti Goyal, Stuti Katara,
Published: 15 February 2021
Chemical Papers, Volume 75, pp 3017-3034; https://doi.org/10.1007/s11696-020-01501-x

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, , Ruchi Gupta, Mouslim Messali, Saud M. Almutairi, Puran L. Sahu, Dau D. Agarwal
Published: 31 December 2018
ACS Omega, Volume 3, pp 18976-18983; https://doi.org/10.1021/acsomega.8b01994

Abstract:
Sustainable synthesis of Ni–Al double-layered catalysts by the coprecipitation method is described. Synthesized double-layered catalysts have been characterized by X-ray diffraction, scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared, and thermogravimetric analyses, which confirmed a hydrotalcite-like structure. In addition, the impact of aging time and temperature on the activity of catalyst has been investigated. Furthermore, it has been confirmed by SEM and TEM analyses that the recovered catalyst has retained its structure. It has also been observed that the prepared material has potency to catalyze the reaction without loss in the yield. To explore the reactivity of the material, the catalyst has been examined in the synthesis of N-(2-hydroxyphenyl)benzamide under solvent-free conditions. The overall process afforded the product with high purity and high yields within short time.
, Suryaman Sama Shrestha
Synthetic Communications, Volume 48, pp 1688-1693; https://doi.org/10.1080/00397911.2018.1459721

Abstract:
The acetylation of phenols with acetic anhydride was achieved using a catalytic amount of magnesium metal powder under air and solvent-free conditions to afford corresponding phenyl acetates in excellent yield (up to 98%). GRAPHICAL ABSTRACT
Kai Fu, Qiu-Fen Wang, Fu-Xu Zhan, Liu Yang, Qian Yang,
Organic Process Research & Development, Volume 19, pp 590-593; https://doi.org/10.1021/acs.oprd.5b00081

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Feng Xie, Fengxia Yan, Mengmeng Chen,
Published: 23 June 2014
RSC Advances, Volume 4, pp 29502-29508; https://doi.org/10.1039/c4ra04618h

Abstract:
The base-catalyzed esterification of alcohols via retro-Claisen condensation has been demonstrated for the first time.
Bishwapran Kashyap,
Published: 18 June 2013
RSC Advances, Volume 3, pp 15327-15336; https://doi.org/10.1039/c3ra41674g

Abstract:
An effective approach to reusing a homogeneous catalyst has been demonstrated. A ferrocene-based bulky pyridine has been synthesized and utilized as a homogeneous catalyst for the synthesis of benzoylfumarates as well as for acetylation. After the reaction, the catalyst was separated by simple precipitation and reused without appreciable loss of activity.
Princy Gupta,
Green Chemistry, Volume 13, pp 2365-2372; https://doi.org/10.1039/c0gc00900h

Abstract:
Amorphous carbon-silica composites bearing sulfonic acid derived from inexpensive natural organic compounds (glucose, maltose, cellulose, chitosan and starch) were prepared by partial carbonization followed by sulfonation and their catalytic activity was evaluated for the protection of aldehydes as 1,1-diacetates and for N-, O- and S-acylations under solvent-free conditions. Different biomaterials have been chosen, with a view to select the most active solid acid catalyst. Carbon-silica composites were characterized by FTIR, XRD and elemental analysis. Sulfonated carbon-silica composite derived from starch was found to be the most active and could be recycled for several runs without loss of significant activity. It was also characterized by TGA, SEM and TEM.
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