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Palladium-Catalyzed Denitrogenative Self-carbonylation of Arylhydrazine Using CO and O_(2) as an Ideal Oxidant

Chinese Journal of Chemistry 2023年第23期41卷 3216-3222页

作者： Yuvraj A.Kolekar bhalchand.a m.bhanage Department of Chemistry Institute of Chemical TechnologyMatungaMumbai400019 India

An efficient Pd/Cu-catalyzed oxidative self-carbonylation of arylhydrazine with CO and molecular oxygen as an oxidant to afford symmetrical biaryl ketones via C—N bond activation has been *** this approach,arylhydrazine hydrochlorides are used as a green arylating agent which releases nitrogen and water as *** developed protocol significantly restricts the formation of aryl iodide and homo-coupled azobenzene products even under favorable conditions.A library of symmetrical biaryl ketones with wide functionalities was synthesized in good yields under mild conditions.

关键词： C(sp2)-N bond activation Carbonylation Symmetric biaryl ketone

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Additive free microwave assisted synthesis of nanocrystalline mg(OH)_2 and mgO

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Particuology 2012年第3期10卷 384-387页

作者： Kushal D.Bhatte Dinesh N.Sawant Krishna m.Deshmukh bhalchand.a m.bhanage Department of Chemistry Institute of Chemical TechnologyN.Parekh MargMatungaMumbai 400019India

A novel approach for additive flee synthesis of nanocrystalline magnesium hydroxide （mH） and magnesium oxide （mgO） using microwave technique is herein reported. Use of 13-propanediol as a solvent played multiple roles circumventing the additional requirement of any extraneous species such as base and other capping agents. The prepared nanomaterials were well characterised using TEm, XRD, EDAX, Raman spectroscopy and FT-IR analysis.

关键词： Nanostructuresmicrowavemg(OH)2mgO 1 3-Propanedio

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Carbon dioxide:a renewable feedstock for the synthesis of fine and bulk chemicals

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Frontiers of Chemical Science and Engineering 2010年第2期4卷 213-235页

作者： Yogesh P.PATIL Pawan J.TAmBADE Sachin R.JAGTAP bhalchand.a m.bhanage Institute of Chemical Technology(Autonomous) N.Parekh MargMatungaMumbai-400019India

The syntheses of carbon dioxide(CO_(2))based industrially important chemicals have gained considerable interest in view of the sustainable chemistry and“green chemistry”*** this review,recent developments in the chemical fixation of CO_(2)to valuable chemicals are *** synthesis of five-member cyclic carbonates via,cycloaddition of CO_(2)to epoxides is one of the promising reactions replacing the existing poisonous phosgene-based synthetic *** review focuses on the synthesis of cyclic carbonates,vinyl carbamates,and quinazoline-2,4(1H,3H)-diones via reaction of CO_(2)and epoxide,amines/phenyl acetylene,2-aminobenzinitrile and other *** synthesis of dimethyl carbonate,1,3-disubstituted urea and 2-oxazolidinones/2-imidazolidinones have limitations at present because of the reaction equilibrium and chemical inertness of CO_(2).The preferred alternatives for their synthesis like transesterification of ethylene carbonate with methanol,transamination of ethylene carbonate with primary amine and transamination reaction of ethylene carbonate with diamines/β-aminoalcohols are *** methodologies offer marked improvements for greener chemical fixation of CO_(2)in to industrially important chemicals.

关键词： carbon dioxide catalysts industrial important chemicals organic carbonates green chemistry urea synthesis

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Synthesis of powdered silver nanoparticles using hydrogen in aqueous medium

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Particuology 2012年第1期10卷 140-143页

作者： Kushal D. Bhatte Krishna m.Deshmukh Yogesh P.Patil Dinesh N.Sawant Shin-Ichiro Fujita masahiko Arai bhalchand.a m.bhanage Department of Chemistry Institute of Chemical Technology Chemical Process Engineering Divison Graduate School of EngineeringHokkaido University

Environmentally benign one-pot protocol is used in the synthesis of silver nanoparticles （AgNPs） in powder form, involving the reduction of silver nitrate in the presence of fully hydrolyzed polyvinyl alcohol （PVA） as stabilizer by hydrogen （H2） as reducing agent in aqueous medium. Fully hydrolyzed biodegradable PVA has extremely low cytotoxicity, making it a favorable stabilizer from green perspective. In the present methodology, essentially naked silver nanoparticles are obtained in good yield. The prepared sil- ver nanoparticles were characterized by TEm, XRD, EDAX, UV-Vis spectroscopy and DLS histogram, and studied for its activity as a recyclable catalyst for synthesis of different enaminones.

关键词： Silver nanoparticlesAqueous mediaHydrogenCatalysisEnaminones synthesis

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Facile synthesis of isoindoline-l,3-diones by palladium-catalyzed carbonylative cyclization of o-bromobenzoic acid and primary amines

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Frontiers of Chemical Science and Engineering 2013年第2期7卷 226-232页

作者： mayur V. KHEDKAR bhalchand.a m. bhanage Department of Chemistry Institute of Chemical Technology Matunga Mumbai 400019 India

A facile method for the carbonylative cycliza- tion of o-bromobenzoic acid with primary amine using Pd（OAC）2 as a metal precursor and 1, l′-bis（diphenylpho- sphino）ferrocene （dppf） as a ligand has been developed. The effect of various reaction parameters such as ligand, solvent, base, time and temperature on this cyclization was studied. The optimized protocol was used for a wide variety of substituted aryl amines with different steric and electronic properties, affording the corresponding isoindoline-l,3-diones in good to excellent yields under atmospheric pressure of carbon monoxide at 100℃ within 10h using 1,4-diazabicyclo[2.2.2]octane （DABCO） as a base. The reaction system finds attractive alternative to the conventional multistep synthetic process and thus repre- sents an effective utilization of carbonylative protocol for synthesis of valuable chemicals.

关键词： carbonylative cyclization reactions isoindole-1,3-dinones homogeneous catalysis dppf

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