Search Results - "Samant, Shriniwas D"

Petroleum Residue Upgrading Via Delayed Coking: A Review by Sawarkar, Ashish N., Pandit, Aniruddha B., Samant, Shriniwas D., Joshi, Jyeshtharaj B.

“…World petroleum residue processing capacity has reached about 725 million metric tons per annum (MMTPA). The high demand for transportation fuels and the…”
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Use of ultrasound in petroleum residue upgradation by Sawarkar, Ashish N., Pandit, Aniruddha B., Samant, Shriniwas D., Joshi, Jyeshtharaj B.

“…Conventional processes for the upgradation of residual feedstocks, viz., thermal cracking and catalytic cracking are carried out in the temperature range of…”
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Comparative study of benzylation of benzene using benzyl chloride in the presence of pillared bentonite; ion-exchanged and pillaring solution impregnated montmorillonite K10 by Singh, Devendrapratap U., Samant, Shriniwas D.

“…▪ Montmorillonite K10 was modified with pillaring solutions of Fe, Al and Zr (K10-MPLS). The catalysts were activated at 120 and 550 °C. The resultant…”
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1,3-Dipolar cycloaddition reaction of aryl nitrile oxides with alkenes using imidazole and pyridine containing reusable polymeric base catalysts by Korgavkar, Nilesh N., Samant, Shriniwas D.

“…Cross-linked poly-1-(4-vinylbenzyl)imidazole and cross-linked poly-4-vinylpyridine have been prepared from respective vinyl monomers using different quantities…”
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Ultrasound-promoted synthesis of 1-amidoalkyl-2-naphthols via a three-component condensation of 2-naphthol, ureas/amides, and aldehydes, catalyzed by sulfamic acid under ambient conditions by Patil, Sachin B., Singh, Pankajkumar R., Surpur, Mandar P., Samant, Shriniwas D.

“…A three-component one-pot condensation of 2-naphthol, ureas/amides and aldehydes catalyzed by sulfamic acid, under ultrasound irradiation and ambient…”
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Synthesis of coumarin based fluorescent compounds by Sanap, Kailas K., Samant, Shriniwas D.

“…The reaction of different 7,8-disubstituted coumarin 4-acetic acids with 7-diethylaminocoumarin-3-carbaldehyde in the presence of piperidine in methanol gives…”
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Facile intramolecular Diels–Alder reaction of 4-(o-propargyloxy)styrylcoumarins leading to highly fluorescent coumarin-containing polycyclic compounds by Khatri, Adil I., Samant, Shriniwas D.

“…The 4-(o-propargyloxy)styrylcoumarins are prepared by the condensation of O-propargylated salicylaldehyde with substituted coumarin-4-acetic acids. The…”
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New insights into the bifunctionality of vanadium phosphorous oxides: A chemical switch between oxidative scission and pinacol rearrangement of vicinal diols by Upadhyaya, Dharita J., Samant, Shriniwas D.

“…[Display omitted] ► New insights into the bifunctionality of VPOs as redox and solid acid catalyst were obtained. ► VPOs can act as the chemical switch between…”
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Mg-Al Hydrotalcite as a First Heterogeneous Basic Catalyst for the Synthesis of 4H-Pyrano[2,3-c]pyrazoles Through a Four-Component Reaction by Kshirsagar, Siddheshwar W., Patil, Nitin R., Samant, Shriniwas D.

“…Mg/Al hydrotalcite acts as an efficient heterogeneous basic catalyst for the synthesis of 4H-pyrano[2,3-c]pyrazoles via a multicomponent reaction of aromatic…”
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Sulfamic Acid (H2NSO3H): A Low-Cost, Mild, and Efficient Catalyst for the Synthesis of Substituted N-Phenylpyrazoles Under Solvent-Free Conditions by Shetty, Mohan R., Samant, Shriniwas D.

“…N-Phenylpyrazoles are synthesized by condensing phenylhydrazine and 1,3-diketones in the presence of a catalytic amount of sulfamic acid, a mild and an…”
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A facile and efficient pinacol-pinacolone rearrangement of vicinal diols using ZnCl2 supported on silica as a recyclable catalyst by UPADHYAYA, Dharita J, SAMANT, Shriniwas D

“…An efficient pinacol rearrangement of variety of primary, secondary and tertiary, symmetrical as well as asymmetrical diols has been investigated using…”
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Silica supported polyvinyl pyridine as a highly active heterogeneous base catalyst for the synthesis of cyclic carbonates from carbon dioxide and epoxides by Jagtap, Sachin R., Raje, Vivek P., Samant, Shriniwas D., Bhanage, Bhalchandra M.

“…Reaction of epoxides and carbon dioxide to corresponding cyclic carbonates using silica supported polyvinyl pyridine as a highly active heterogeneous base…”
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Low temperature recyclable catalyst for Heck reactions using ultrasound by Ambulgekar, Girish V., Bhanage, Bhalchandra M., Samant, Shriniwas D.

“…[Display omitted] The Heck reaction of iodobenzene with methyl acrylate in NMP as a solvent has been studied using Pd/C as a catalyst in the presence of…”
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Synthesis of fluorescent dibenzopyranones by the Diels-Alder reaction of 4-styrylcoumarins and N-phenylmaleimide and in situ aromatization using DDQ by Sanap, Kailas K., Samant, Shriniwas D.

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Investigation of Diels-Alder Reaction of 7-Substituted 4-Styrylcoumarins with Symmetrical Dienophiles Leading to 3,4-Annulated Coumarins by Sanap, Kailas K., Kulkarni, Rama S., Samant, Shriniwas D.

“…The thermal [4 + 2] cycloaddition reaction of 7‐substituted 4‐styrylcoumarins with N‐phenylmaleimide and tetracyanoethylene in nitrobenzene under reflux…”
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Acylation of Aromatic Ethers Using Different Carboxylic Acid Anhydrides as Acylating Agents in the Presence of Nontoxic, Noncorrosive Resin Amberlyst 15 as a Solid Acid Catalyst by Pande, Manoj A., Samant, Shriniwas D.

“…Friedel-Crafts acylation of aromatic ethers, anisole, 2-methoxynaphthalene, and dimethoxybenzenes with different acid anhydrides is carried out in the presence…”
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Nitration of Aromatic Hydrocarbons and Halobenzenes Using NOx Catalyzed by Solid Acid Catalysts by Pande, Manoj A., Samant, Shriniwas D.

“…The nitration of aromatics using zeolite as a solid inorganic catalyst and nitric oxides as nitrating agents is a relatively clean process for aromatic…”
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Ultrasound-Assisted Regioselective Nitration of Phenols Using Dilute Nitric Acid in a Biphasic Medium by Nandurkar, Nitin S, Bhor, Malhari D, Samant, Shriniwas D, Bhanage, Bhalchandra M

“…A simple and convenient methodology for the regioselective nitration of phenols using dilute nitric acid as a nitrating agent under sonication is described…”
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tert-Butylation of phenols using tert-butyl alcohol in the presence of FeCl3-modified montmorillonite K10 by SHINDE, Ajit B, SHRIGADI, Nilesh B, SAMANT, Shriniwas D

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Chemoselective Protection of Aldehydes in the Presence of Ketones Using RuPVP Complex as a Heterogeneous Catalyst by Kshirsagar, Siddheshwar W., Patil, Nitin R., Samant, Shriniwas D.

“…Ruthenium(III)-polyvinyl pyridine (RuPVP) complex was prepared by refluxing a methanolic solution of polyvinyl pyridine and trihydrated ruthenium trichloride…”
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