Diversifying fluoroalkanes: light-driven fluoroalkyl transfer via vinylboronate esters Kaushik Chakrabarti, Chandana Sunil, Benjamin M. Farris, Simon Berritt, Kyle Cassaidy, et al. Chemical Science, 2025 A metal-free strategy to access tertiary difluoromethylene-containing molecules from RCF2H (R = aryl, H, F) precursors, vinyl-pinacol boronic ester (BPin) reagents, and proradical reagents is reported.
A metal-free strategy to construct fluoroalkyl-olefin linkages using fluoroalkanes Kaushik Chakrabarti, Michael M. Wade Wolfe, Shuo Guo, Joseph W. Tucker, Jisun Lee, et al. Chemical Science, 2023 We report a metal-free strategy to access fluoroalkyl–olefin linkages from RCF2H (R = aryl, H, F and fluoroalkyl) precursors and vinyl-pinacol boronic ester (BPin) reagents.
Enhancing the Stability of Aromatic PCN Pincer Nickel Complexes by Incorporation of Pyridine as the Nitrogen Side Arm Abdelrazek H. Mousa, Kaushik Chakrabarti, Ghodsieh Isapour, Jesper Bendix, Ola F. Wendt European Journal of Inorganic Chemistry, 2020 New PCNPy pincer nickel complexes have been synthesized through a short synthetic route. Incorporating pyridine as the nitrogen side arm facilitated the C–H activation in the PCN ligand and allowed the cyclometallation with nickel to take place at room temperature. Pyridine also enhanced the stability of β‐hydrogen‐containing alkyl complexes. Also, the symmetric NCN nickel complex with pyridine side arms was successfully obtained giving a rare example of such type of complexes to be prepared through direct C–H activation. Furthermore, preliminary results showed that the (PCNPy)Ni–Br is active in Kumada coupling reactions particularly the coupling of aryl halides with aryl Grignard reagents.
Synthesis of: N -methylated amines from acyl azides using methanol Kaushik Chakrabarti, Kuheli Dutta, Sabuj Kundu Organic and Biomolecular Chemistry, 2020 The Ru(ii) complex catalysed direct transformation of acyl azides intoN-methylamines was developed for the first time using methanolviathe one-pot Curtius rearrangement and borrowing hydrogen methodology.
Direct Synthesis of N,N-Dimethylated and β-Methyl N,N-Dimethylated amines from nitriles using methanol: Experimental and computational studies Bhaskar Paul, Sujan Shee, Dibyajyoti Panja, Kaushik Chakrabarti, Sabuj Kundu ACS Catalysis, 2018 Direct and selective synthesis of N,N-dimethylated amines from nitriles using methanol as C1 building blocks is reported using an air- and moisture-stable ruthenium complex. Following this process, various aromatic as well as aliphatic nitriles were converted to the corresponding N-methylated amines. Interestingly, tandem C-methylation as well as N-methylation was achieved by introducing multiple methyl groups. The practical aspect of this process was revealed by preparative-scale reactions with different nitriles and the synthesis of anti-allergic drug “avil”. Several kinetic experiments and detailed DFT calculations were carried out to understand the mechanism of this process.
Knowledge driven pre-trained form key mapping S Kundu, J Zhang, K Chakrabarti, Y CHING, L ROMANIUK, Z Chen, ... US Patent 12,423,949 , 2025 2025 Citations: 1
Diversifying fluoroalkanes: light-driven fluoroalkyl transfer via vinylboronate esters K Chakrabarti, C Sunil, BM Farris, S Berritt, K Cassaidy, J Lee, ... Chemical Science 16 (16), 6975-6981 , 2025 2025 Citations: 1
A metal-free strategy to construct fluoroalkyl–olefin linkages using fluoroalkanes K Chakrabarti, MMW Wolfe, S Guo, JW Tucker, J Lee, NK Szymczak Chemical Science 15 (5), 1752-1757 , 2024 2024 Citations: 5
Eyes-on analysis results for improving search quality X Yun, J Sun, Z Chen, K Chakrabarti, LM ROMANIUK, P Hu, M Wang, ... US Patent App. 17/579,337 , 2023 2023 Citations: 5
A Scalable Process for the Production of Calcium Formate from Lime Mud O Abdelaziz, M Galbe, K Chakrabarti, C Kugge, H Spod, OF Wendt, ... 2023 AIChE Spring Meeting and 19th Global Congress on Process Safety, GCPS 2023 , 2023 2023
Acceptorless dehydrogenation of 4-methylpiperidine by supported pincer-ligated iridium catalysts in continuous flow K Chakrabarti, A Spangenberg, V Subramaniyan, A Hederstedt, ... Catalysis Science & Technology 13 (17), 5113-5119 , 2023 2023 Citations: 8
Long term ionospheric VTEC variation during Solar Cycle 24 as observed from Indian IGS GPS station S Kundu, S Sasmal, KS Chakrabarti Int. J. Sci. Res. in Physics and Applied Sciences Vol 9 (4) , 2021 2021 Citations: 11
Enhancing the stability of aromatic PCN pincer nickel complexes by incorporation of pyridine as the nitrogen side arm AH Mousa, K Chakrabarti, G Isapour, J Bendix, OF Wendt European Journal of Inorganic Chemistry 2020 (45), 4270-4277 , 2020 2020 Citations: 12
Synthesis of N-methylated amines from acyl azides using methanol K Chakrabarti, K Dutta, S Kundu Organic & Biomolecular Chemistry 18 (30), 5891-5896 , 2020 2020 Citations: 10
Tandem transformations and multicomponent reactions utilizing alcohols following dehydrogenation strategy B Paul, M Maji, K Chakrabarti, S Kundu Organic & Biomolecular Chemistry 18 (12), 2193-2214 , 2020 2020 Citations: 99
Ruthenium-catalyzed direct cross-coupling of secondary alcohols to β-disubstituted ketones S Thiyagarajan, C Gunanathan Synlett 30 (18), 2027-2034 , 2019 2019 Citations: 23
Sustainable synthesis of N-heterocycles in water using alcohols following the double dehydrogenation strategy M Maji, K Chakrabarti, D Panja, S Kundu Journal of Catalysis 373, 93-102 , 2019 2019 Citations: 104
Ethene-1, 1, 2, 2-tetracarbonitrile and Methanol in the Methylating Reaction of Tertiary Amines to the Quaternary Ammonium Compounds of 1, 1-Dicyano-2-methoxy-2-oxoethane-1-ide VР Sheverdov, VV Davydova, OE Nasakin, MA Mar’yasov, ... Synlett 30 (02), 173-177 , 2019 2019 Citations: 6
Cooperative iridium complex-catalyzed synthesis of quinoxalines, benzimidazoles and quinazolines in water K Chakrabarti, M Maji, S Kundu Green Chemistry 21 (8), 1999-2004 , 2019 2019 Citations: 136
Direct synthesis of N, N-dimethylated and β-methyl N, N-dimethylated amines from nitriles using methanol: experimental and computational studies B Paul, S Shee, D Panja, K Chakrabarti, S Kundu ACS Catalysis 8 (4), 2890-2896 , 2018 2018 Citations: 65
Ruthenium (II)‐NNN‐Pincer‐Complex‐Catalyzed Reactions Between Various Alcohols and Amines for Sustainable C− N and C− C Bond Formation M Maji, K Chakrabarti, B Paul, BC Roy, S Kundu Advanced Synthesis & Catalysis 360 (4), 722-729 , 2018 2018 Citations: 149
ortho-Amino group functionalized 2, 2′-bipyridine based Ru (II) complex catalysed alkylation of secondary alcohols, nitriles and amines using alcohols BC Roy, S Debnath, K Chakrabarti, B Paul, M Maji, S Kundu Organic Chemistry Frontiers 5 (6), 1008-1018 , 2018 2018 Citations: 86
Selective synthesis of mono-and di-methylated amines using methanol and sodium azide as C1 and N1 sources K Chakrabarti, A Mishra, D Panja, B Paul, S Kundu Green Chemistry 20 (14), 3339-3345 , 2018 2018 Citations: 38
Rapid continuous ruthenium-catalysed transfer hydrogenation of aromatic nitriles to primary amines R Labes, D Gonzalez-Calderon, C Battilocchio, C Mateos, GR Cumming, ... Synlett 28 (20), 2855-2858 , 2017 2017 Citations: 15
Tandem Cross Coupling Reaction of Alcohols for Sustainable Synthesis of β‐Alkylated Secondary Alcohols and Flavan Derivatives S Shee, B Paul, D Panja, BC Roy, K Chakrabarti, K Ganguli, A Das, ... Advanced Synthesis & Catalysis 359 (22), 3888-3893 , 2017 2017 Citations: 59
MOST CITED SCHOLAR PUBLICATIONS
Ruthenium (II)‐NNN‐Pincer‐Complex‐Catalyzed Reactions Between Various Alcohols and Amines for Sustainable C− N and C− C Bond Formation M Maji, K Chakrabarti, B Paul, BC Roy, S Kundu Advanced Synthesis & Catalysis 360 (4), 722-729 , 2018 2018 Citations: 149
Cooperative iridium complex-catalyzed synthesis of quinoxalines, benzimidazoles and quinazolines in water K Chakrabarti, M Maji, S Kundu Green Chemistry 21 (8), 1999-2004 , 2019 2019 Citations: 136
Utilization of MeOH as a C1 building block in tandem three-component coupling reaction K Chakrabarti, M Maji, D Panja, B Paul, S Shee, GK Das, S Kundu Organic letters 19 (18), 4750-4753 , 2017 2017 Citations: 106
Sustainable synthesis of N-heterocycles in water using alcohols following the double dehydrogenation strategy M Maji, K Chakrabarti, D Panja, S Kundu Journal of Catalysis 373, 93-102 , 2019 2019 Citations: 104
Tandem Transformation of Nitro Compounds into N ‐Methylated Amines: Greener Strategy for the Utilization of Methanol as a Methylating Agent B Paul, S Shee, K Chakrabarti, S Kundu ChemSusChem 10 (11), 2370-2374 , 2017 2017 Citations: 104
Tandem transformations and multicomponent reactions utilizing alcohols following dehydrogenation strategy B Paul, M Maji, K Chakrabarti, S Kundu Organic & Biomolecular Chemistry 18 (12), 2193-2214 , 2020 2020 Citations: 99
ortho-Amino group functionalized 2, 2′-bipyridine based Ru (II) complex catalysed alkylation of secondary alcohols, nitriles and amines using alcohols BC Roy, S Debnath, K Chakrabarti, B Paul, M Maji, S Kundu Organic Chemistry Frontiers 5 (6), 1008-1018 , 2018 2018 Citations: 86
Optimum bifunctionality in a 2-(2-pyridyl-2-ol)-1, 10-phenanthroline based ruthenium complex for transfer hydrogenation of ketones and nitriles: impact of the number of 2 … B Paul, K Chakrabarti, S Kundu Dalton Transactions 45 (27), 11162-11171 , 2016 2016 Citations: 76
Bifunctional Ru II ‐Complex‐Catalysed Tandem C−C Bond Formation: Efficient and Atom Economical Strategy for the Utilisation of Alcohols as Alkylating Agents BC Roy, K Chakrabarti, S Shee, S Paul, S Kundu Chemistry–A European Journal 22 (50), 18147-18155 , 2016 2016 Citations: 70
Bifunctional Ru (ii) complex catalysed carbon–carbon bond formation: an eco-friendly hydrogen borrowing strategy K Chakrabarti, B Paul, M Maji, BC Roy, S Shee, S Kundu Organic & Biomolecular Chemistry 14 (46), 10988-10997 , 2016 2016 Citations: 66
Direct synthesis of N, N-dimethylated and β-methyl N, N-dimethylated amines from nitriles using methanol: experimental and computational studies B Paul, S Shee, D Panja, K Chakrabarti, S Kundu ACS Catalysis 8 (4), 2890-2896 , 2018 2018 Citations: 65
Tandem Cross Coupling Reaction of Alcohols for Sustainable Synthesis of β‐Alkylated Secondary Alcohols and Flavan Derivatives S Shee, B Paul, D Panja, BC Roy, K Chakrabarti, K Ganguli, A Das, ... Advanced Synthesis & Catalysis 359 (22), 3888-3893 , 2017 2017 Citations: 59
A simple and efficient in situ generated ruthenium catalyst for chemoselective transfer hydrogenation of nitroarenes: kinetic and mechanistic studies and comparison with … B Paul, K Chakrabarti, S Shee, M Maji, A Mishra, S Kundu RSC advances 6 (102), 100532-100545 , 2016 2016 Citations: 41
Selective synthesis of mono-and di-methylated amines using methanol and sodium azide as C1 and N1 sources K Chakrabarti, A Mishra, D Panja, B Paul, S Kundu Green Chemistry 20 (14), 3339-3345 , 2018 2018 Citations: 38
Ruthenium-catalyzed direct cross-coupling of secondary alcohols to β-disubstituted ketones S Thiyagarajan, C Gunanathan Synlett 30 (18), 2027-2034 , 2019 2019 Citations: 23
Rapid continuous ruthenium-catalysed transfer hydrogenation of aromatic nitriles to primary amines R Labes, D Gonzalez-Calderon, C Battilocchio, C Mateos, GR Cumming, ... Synlett 28 (20), 2855-2858 , 2017 2017 Citations: 15
Enhancing the stability of aromatic PCN pincer nickel complexes by incorporation of pyridine as the nitrogen side arm AH Mousa, K Chakrabarti, G Isapour, J Bendix, OF Wendt European Journal of Inorganic Chemistry 2020 (45), 4270-4277 , 2020 2020 Citations: 12
Long term ionospheric VTEC variation during Solar Cycle 24 as observed from Indian IGS GPS station S Kundu, S Sasmal, KS Chakrabarti Int. J. Sci. Res. in Physics and Applied Sciences Vol 9 (4) , 2021 2021 Citations: 11
Synthesis of N-methylated amines from acyl azides using methanol K Chakrabarti, K Dutta, S Kundu Organic & Biomolecular Chemistry 18 (30), 5891-5896 , 2020 2020 Citations: 10
Acceptorless dehydrogenation of 4-methylpiperidine by supported pincer-ligated iridium catalysts in continuous flow K Chakrabarti, A Spangenberg, V Subramaniyan, A Hederstedt, ... Catalysis Science & Technology 13 (17), 5113-5119 , 2023 2023 Citations: 8