Publications

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• N. Kashyap, S. Das and R. Borah, Solvent responsive self-separation behaviour of Brønsted acidic ionic liquid-polyoxometalate hybrid catalysts on H2O2 mediated oxidation of alcohols. Polyhedron, 196, p.114993, 2021.

• A. K. Dutta, K. Boruah and R. Borah, Development of N,N-disulfo-1,1,3,3-tetramethylguanidinium Chlorometallates as Heterogeneous Catalysts for One Pot Synthesis of 1,2-dihydro-1-aryl-3H-naphth[1, 2-e][1,3]oxazin-3-one Derivatives. Current Organocatalysis, 7, 2020.

• P. Gogoi, K. Boruah and R. Borah, Studies on coordination environment of transition metal chloride anionic speciation of N, N disulfodiisopropylammonium ionic salts and assessment of their Brønsted-Lewis acidic properties.  Indian Journal of Chemistry Vol. 59A, October 1476-1483, 2020.

• S. Das, B. Porashar, S. Saikia and R. Borah, "Brönsted acidic ionic liquids catalysed sequential Michael-like addition of indole with chalcones via Claisen-Schmidt condensation", Chemistry Select, 5, 3041, 2020.

• K. Boruah, R. Borah, Design of Water Stable 1, 3‐Dialkyl‐2‐Methyl Imidazolium Basic Ionic Liquids as Reusable Homogeneous Catalysts for Aza‐Michael Reaction in Neat Condition. Chemistry Select, 4(12), 3479-3485, 2019.

• S. Saikia, R. Borah, 2‐Methyl‐1, 3‐disulfoimidazolium polyoxometalate hybrid catalytic systems as equivalent safer alternatives to concentrated sulfuric acid in nitration of aromatic compounds, Applied Organometallic Chemistry 33 (10), e5146, 2019.

• S Saikia, R Borah, One‐Pot Sequential Synthesis of 2‐Amino‐4, 6‐Diaryl Pyrimidines Involving SO3H‐Functionalized Piperazinium‐Based Dicationic Ionic Liquids as Homogeneous, Chemistry Select 4 (30), 8751-8756, 2019.

• S Das, T Dutta, R Borah, Comparative study of the physical and electrochemical behavior of direct N-SO3H functionalized 1, 3-disulfo-2-alkyl-imidazolium trifluoroacetate ionic liquids in molecular solvents, Journal of Molecular Liquids, 111099,  2019.

• K. Boruah and R. Borah, Design of water stable 1,3-dialkyl-2-methyl imidazolium basic ionic liquids as reusable homogeneous catalysts for Aza-Michael reaction in neat condition, Chemistry Select, Chemistry Select 4 (12), 3479-3485, 2019.

• S. Saikia, K. Puri, R. Borah. Supported dual acidic 1,3-disulfoimidazolium chlorozincate@HZSM-5 as promising heterogeneous catalyst for synthesis of indole derivatives, App. Organometallic Chem., 2019, 33, 1-12.

• P. Gogoi, K.  Boruah, R.  Borah, Synthesis of triethylamine bridged basic tricationic ionic liquids and evaluation of their catalytic efficiencies for preparation of arylidene or alkylidenemalononitriles, Chemistry Select, 2018, 3, 9476-9483.

• P. Gogoi, and  R. Borah, Investigation of PEG-6000 bridged -N-SO3H functionalized germinal dicationic ionic liquids for catalytic conversion of fructose to 5-hydroxymethyl furfural, J. Chem.  Sci.  2018, 130, 170.

• S. Saikia, P. Gogoi and  R Borah, [18]1, 3-Disulfoimidazolium chloronickellate immobilized HZSM-5 framework as visible-light-induced heterogeneous photocatalyst for advanced oxidation process, New J. Chem. 2018, 42 , 3867-3877.

• A. K.  Dutta, P. Gogoi and R. Borah, Diethyl disulfoammonium chlorometallates as heterogeneous Brønsted–Lewis acidic catalysts for one‐pot synthesis of 14‐aryl‐7‐(N‐phenyl)‐14H‐dibenzo [a, j] acridines, App. Organometallic Chem., 2018, 32, 3900, 2018.

• P. Sarma, A.K. Dutta and R. Borah, Design  and exploration of –SO3H group functionalized Bronsted acidic ionic liquids (BAILs) as task-specific catalytic systems for organic reactions: A review of literature, Catal. Survey Asia, 2017, 21, 70-93.

• P. Gogoi, A. K. Dutta  and R. Borah, Studies on structural changes and catalytic activity of Y-zeolite composites of 1, 3-disulfoimidazolium trifluoroacetate ionic liquid (IL) for three component synthesis of 3, 4-dihydropyrimidinones, Cata. Lett. 2017, 147, 674-685.

• A. K Dutta, P Gogoi and R Borah, Triphenylsulfophosphonium chlorometallates as efficient heterogeneous catalysts for the three-component synthesis of 2,3-dihydro-1,2,3-trisubstituted-1H-naphth[1-2-e][1,3] oxazines, Polyhedron, 2017, 123, 184-191.

• A. K. Dutta, P Gogoi, S Saikia  and R Borah, N, N-disulfo-1, 1, 3, 3-tetramethylguanidinium carboxylate ionic liquids as reusable homogeneous catalysts for multicomponent synthesis of tetrahydrobenzo [a] xanthene and tetrahydrobenzo [a] acridine derivatives, J. Molecular Liq. 2017,  225, 585-591.

• P. Gogoi, A. K. Dutta, S. Saikia, R. Borah, Heterogenized hybrid catalyst of 1-sulfonic acid-3-methylimidazolium ferric chloride over NaY zeolite for one-pot synthesis of 2-amino-4-arylpyrimidine derivatives: A viable approach, Appl. Catal. A: Gen., 2016, 523, 321–331

• A K.Dutta, P.Gogoi,M. P. Saikia and R.  Borah, Development of environmentally benign methods towards the synthesis of anti-2, 3-dihydro-1, 2, 3-trisubstituted-1H-naphth[1, 2-e][1, 3] oxazines using  Brønsted acidic catalysts, Catal. Lett. 2016, 146, 902.

• S. Saikia, P. Gogoi, A. K. Dutta, P. Sarma and R. Borah, Design of multifaceted acidic 1, 3-disulfoimidazolium chlorometallate ionic systems as heterogeneous catalysts for the preparation of β-amino carbonyl compounds, J. Mol. Cata. A: Chem. 2016, 416, 63.

• P. Sarma, S. Saikia  and R. Borah, Studies on –SO3H functionalized Brønsted acidic imidazolium ionic liquids (ILs) for one-pot two step synthesis of 2-styrylquinolines, Syn. Commun.  2016, 46, 1187-1196.

• P. Sarma, S. Saikia and R. Borah, Designing of Supported Organocatalysts from Carboxylic Acids for the Mannich-Type Synthesis of β-Amino Carbonyl Compounds, Syn. Commun., 2015, 45, 2810.

• P.Gogoi, A.K.Dutta, P.Sarma, R. Borah , Development of Bronsted-Lewis acidic solid catalytic system of 3-methyl-1-sulfonic imidazolium transition metal chlorides for the preparation of bis(indolyl)methanes,  Appl. Cata.  A : Gen., ,2015, 492, 133-139.

• P.Sarma, A.K.Dutta, P.Gogoi, B.Sarma and R. Borah ‘’ 3-Methyl-1-sulfoimidazolium ionic liquids as recyclable medium for efficient synthesis of quinoline derivatives by Friedlander  annulations, Monats.Chemie ,2015, 146, 173-180.

• P. Dutta and R. Borah, Boron sulfonic acid (BSA) catalyzed selective synthesis of aryl-bis-(2-hydroxynaph-1-yl)methanes and 14-alkyl and 14-aryl-14H-dibenzoxanthenes under solvent-free condition, Curr. Chem. Lett. 2015, 4, 93-100. 

• A.K .Dutta, P.Sarma, C. Dutta, B.Sarma, R. Borah ,Synthesis of anti-2,3-dihydro-1,2,3-trisubstituted- 1H-naphth [1,2-e][1,3]oxazine derivatives via multicomponent approach, RSC. Adv., 2014, 4, 10912-10917.

• A.K.Dutta, P.Gogoi, R.Borah , Synthesis of dibenzoxanthene and acridine derivatives catalysed by 1.3-disulfonic acid imidazolium carboxylate ionic liquids, RSC. Adv. 2014, 4, 41287-41291.

•  R.Devi, R. Borah, R.C.Deka, Investigation of structural change and basicity of NaY zeolite upon loading KF and their application in Henry nitroaldol reaction under microwave irradiation condition, Catal.  Lett. 2014 , 144, 1751–1758.

• P. Dutta, M. K. Saikia, R.J. Das, R . Borah , Investigation of keto-enol tautomers during the synthesis of aryl-bis-(2-hydroxy-1-naphthyl)methanes J. Chem. Sci. 2014, 126, 1629-1634.

• P. Sarmah, P. Gogoi and R. Borah , Nitrogen bound polymers as heterogeneous basic catalysts for diastereoselective Henry reaction in aqueous medium, Current Organocatalysis, 2014, 1, 40-44.

• P. Dutta, A. K. Dutta, P. Sarma and R.  Borah,  Dual nature of polyethylene glycol under microwave irradiation for the clean synthesis of oximes, Monats.für Chemie.. 2014, 145, 505-508.

• P. Dutta, P. Sarmah and R. Borah, Investigation of efficient synthesis of 1,8-dioxo-octahydroxanthene derivatives under solvent-free grinding method, Curr. Chem. Lett., 2013, 2, 159-166.

• P. Dutta, P. Sarmah and R. Borah, P4VP-H2SO4 catalyzed chemoselective protection of aldehydes to acylal along with deprotection reactions, Syn. Commun. 2013, 43, 1378-1386.

• R. Devi, R. Borah and R. C. Deka,  Design of zeolite catalysts for nitroaldol reaction under mild condition,   Appl. Cat. A : Gen., 2012, 122, 433-434.

• K. J. Borah and R. Borah , Investigation of Prins reaction for the synthesis of 2,4-disubstituted tetrahydropyran derivatives and 1, 3-dioxanes using polyaniline supported acid as reusable catalyst, J. Chem. Sci. 2011, 123, 623-630.

• K. J. Borah and R. Borah, Poly-(4-vinylpyridine_-supported sulfuric acid : an efficient solid acid catalyst for the synthesis of coumarin derivatives  under solvent-free condition, Monats.für Chemie , 2011, 142, 1253.

• K. J. Borah, P. Dutta and R. Borah, Synthesis, characterization and applications of poly(4-vinylpyridine)-supported Bronsted acid as reusable catalyst for acetylation reaction Bull. Korean. Chem. Society, 2011, 32, 225-228.

• M. Phukan, M. K. Kalita and R. Borah, A new protocol for Biginelli (or like) reaction under solvent-free grinding method using Fe(NO3)3,9H2O as catalyst, Green. Chem. Lett  Rev. 2010, 3, 329-334.

• M. Phukan and R. Borah, Synthesis of β-amino esters / β-lactams via ester enolate –imine condensation using basic alumina/KF supported on alumina, Bull. Catal. Society of India, 2010, 9, 83-90.

• K. J. Borah, M; Phukan and R. Borah, Aza-Michael addition of amines to α ,β-unsaturated  compounds using molecular iodine as catalyst, Syn. Commun. 2010, 40, 2830-2836.

• M. Phukan, K. J. Borah, and R. Borah, Henry reaction in environmentally benign methods using imidazole as catalyst, Green. Chem. Lett  Rev. 2009, 2, 249-253.

• S. Das, R. Borah, R.R. Devi and A.J. Thkur, Molecular iodine in protection  and deprotection chemistry, Synlett, 2008, 18, 2741-2762.

• M. Phukan, K. J. Borah, and R. Borah, Imidazole catalyzed Henry reaction in aqueous medium , Syn. Commun. 2008, 38, 3068-3073.

• K. J. Borah, M. Phukan and R. Borah, Synthesis of 1,3-dioxanes catalyzed by TsOH-SiO2 under solvent-free condition, Syn. Commun. 2008, 38, 3082-3087.

• R. Borah and A. J. Thakur, Green synthesis of tetralkylammonium tribromide using Cerium (IV) ammonium nitrate (CAN) as oxidant, Syn. Commun. 2007, 37, 933-939.

• P. Hazarika, D. Kalita, S. Sarmah, R. Borah and N.S. Islam, New oxo-bridged dinuclear peroxotungsten(VI) complexes: Synthesi, stability and activity in bromoperoxidation, Polyhedron, 2006, 25, 3501-3508.

• S. Sarmah , D. Kalita, P. Hazarika, R. Borah and N.S. Islam, Synthesis of newer dinuclear and mono-nuclear peroxo-vanadium (V) complexes containing biogenic co-ligands. A comparative study of some parameters, Polyhedron, 2004, 23, 1097-1107.

• I. Saxena, R. Borah and J. C. Sarma, Sodium borohydride iodine : an efficient reagent for reductive amination of aromatic aldehydes, Ind. J. Chem. 2002, 41B, 1970-1971.

• R. Borah , D. J. Kalita and J.C.Sarma, Microwave promoted selective preparation of acetals and esters from aldehydes, Ind. J. Chem. 2002, 41B, 1032-1038.

• R. Borah and J. C. Sarma, Studies on ambiphilic radicals generated from the ester of N-hydroxy-2-thiopyridone, Ind. J. Chem. 2000, 39B, 592-596.

• I. Saxena, R. Borah and J. C. Sarma Reductive amination of aromatic aldehydes and ketone with nickel boride , JCS Perkin Trans I , 2000, 503-504.

• D. J. Kalita , R. Borah and J. C. Sarma,  A selective catalytic method of enol acetylation under microwave irradiation,  J. Chem. Res. (s), 1999, 405.

• N. Deka , R. Borah and J.C Sarma, Synthesi of 1,1- diacetatesfrom aldehydesusing trimethylchlorosilane and sodium iodide as catalyst, J. Chem. Res(s), 1998, 95.

• D. J. Kalita , R. Borah and J. C. Sarma, A new selective catalytic acetalization method promoted by microwave irradiation, Tett. Lett.  1998, 39, 4573.

• R. Borah and J. C. Sarma, Behaviour of alpha-carbethoxy radical generated from the ester of N-hydroxy-2-thiopyridone, Ind. J. Chem. 1997, 36 A & B, 533.

• N.Deka, D. J. Kalita, R. Borah and J. C. Sarma, Iodine as acetylation catalyst in the preparation of  1, 1-diacetates from aldehyde, J. Org. Chem. 1997, 62, 1563.

• R. Borah , N. Deka and J. C. Sarma, Iodine as an acetyl transfer catalyst, J. Chem. Res (s), 1997,110.

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Book Chapter

  

• P. Gogoi, S. Susmita, A. K. Dutta, and R. Borah. Acidic and Basic Functionalized Ionic Liquid Systems for Advanced Synthesis of Five and Six Membered Nitrogenates Heterocycles. In Advances in Organic Synthesis, vol. 10, pp. 139-196. Bentham Publisher United Arab Emirates, 2018.

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• N. Kashyap, S. Das and R. Borah. A Brief Insight into the Polyoxometalate Based Organic-Inorganic Hybrid Systems and their Catalytic uses in Oxidation and Acid Catalyzed Organic Reactions, Edited by Dr. Ashok Kumar Acharya, AkiNik, 2020 . (ISBN:978-93-90420-17-9)

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• S. Das, N. Kashyap, S. Kalita, D. B. Bora and R. Borah. A brief insight into the physicochemical properties of room-temperature acidic ionic liquids and their catalytic applications in C-C bond formation reactions, Edited by Ian H. Williams and Nicholas H. Williams, Elsevier, 2020. (ISBN: 978-0-12-821820-4)

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• S. Saikia and R. Borah. Ionic Liquid based Polyoxometallate as Functionalized Organic-Inorganic hybrid materials for catalytic organic reactions, Edited by Atta-Ur Rahman, Bentham Science Publishers Limited, 2021. (ISBN: 978-981-18-0373-4)

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