Search results for: Biraj Jyoti Borah

Items from 1 to 5 out of 5 results

article

Construction of Benzosultam‐Containing Fused‐ and Linked‐Biheterocycles by a Cascade Double Nucleophilic Cyclization

Jonali Das, Biraj Jyoti Borah, Sajal Kumar Das

European Journal of Organic Chemistry > 2022 > 10 > n/a - n/a

Although nucleophilic aromatic substitution (S_NAr) and many nucleophilic epoxide ring‐opening reactions proceed under similar anionic conditions, the literature examples of using these reactions in tandem for the construction of heterocyclic compounds are scarce. In this article, we disclose a detailed account of the synthesis of benzothiaoxazepine‐1,1‐dioxide‐containing fused‐ and linked‐biheterocycles...

article

Direct Hydrogenation of Nitroaromatics at Room Temperature Catalyzed by Magnetically Recoverable Cu@Fe₂O₃ Nanoparticles

Biraj Jyoti Borah, Pankaj Bharali

Applied Organometallic Chemistry > 34 > 9 > n/a - n/a

Metal embedded in metal oxide nanoparticles are active as catalyst in plethora of industrially important reactions. Herein, embedded Cu@Fe₂O₃ nanoparticles was synthesized via a one step hydrothermal strategy which selectively catalyzes the hydrogenation of diverse nitroaromatics in H₂O at room temperature. The remarkable catalytic performance is due to the successful hybridization of metallic Cu...

article

Synthesis of Tetrahydroquinoline‐Embedded Bridged Benzothiaoxazepine‐1,1‐dioxides

Hemi Borgohain, Runjun Devi, Divya Dheer, Biraj Jyoti Borah, more

European Journal of Organic Chemistry > 2017 > 45 > 6671 - 6679

A diastereoselective synthesis of previously unknown tetrahydroquinoline‐containing bridged benzothiaoxazepine‐1,1‐dioxides is presented. The three‐step protocol uses readily available N‐aryl‐2‐fluorobenzenesulfonamides and trans‐2,3‐epoxy‐cinnamyl‐alcohol‐derived tosylates as the starting materials, involves N‐alkylation of sulfonamides, intramolecular epoxide ring‐opening, and S_NAr reactions as...

article

Enhanced catalytic activity of CuPd alloy nanoparticles towards reduction of nitroaromatics and hexavalent chromium

Himadri Saikia, Biraj Jyoti Borah, Yusuke Yamada, Pankaj Bharali

Journal of Colloid and Interface Science > 2017 > 486 > C > 46-57

The present work reports a surfactant-free, economically feasible chemical route to synthesize bimetallic CuPd alloy nanoparticles under hydrothermal condition. The structural and morphological characterizations of the nanoparticles are carried out by XRD, SEM/EDX, TEM, XPS and BET surface area analyses. The synthetic strategy comprises of 9:1 molar composition of Cu²⁺ and Pd²⁺ salt in the aqueous...

article

Surfactant-free synthesis of CuNi nanocrystals and their application for catalytic reduction of 4-nitrophenol

Biraj Jyoti Borah, Pankaj Bharali

Journal of Molecular Catalysis. A, Chemical > 2014 > 390 > Complete > 29-36

Surfactant-free hydrothermal method is successfully employed to synthesize various compositions of CuNi bimetallic nanocrystals. The synthesized nanocrystals are applied for the study of composition dependency on their activity considering the reduction of 4-nitrophenol as model reaction. The nanocrystals are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive...

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Search results for: Biraj Jyoti Borah

Construction of Benzosultam‐Containing Fused‐ and Linked‐Biheterocycles by a Cascade Double Nucleophilic Cyclization

Direct Hydrogenation of Nitroaromatics at Room Temperature Catalyzed by Magnetically Recoverable Cu@Fe2O3 Nanoparticles

Synthesis of Tetrahydroquinoline‐Embedded Bridged Benzothiaoxazepine‐1,1‐dioxides

Enhanced catalytic activity of CuPd alloy nanoparticles towards reduction of nitroaromatics and hexavalent chromium

Surfactant-free synthesis of CuNi nanocrystals and their application for catalytic reduction of 4-nitrophenol

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Direct Hydrogenation of Nitroaromatics at Room Temperature Catalyzed by Magnetically Recoverable Cu@Fe₂O₃ Nanoparticles