Organometallics & Catalysis Laboratory
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P. Pradhan, S. Moktan, A. Biswas, A. Das, R. Lenka, P. K. Kancharla* Triple Role of Proton Sponge (DMAN) in the Palladium-Catalyzed Direct Stereoselective Synthesis of C‑Aryl Glycosides from Glycals Org. Lett. 2024, ASAP. Link
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S. K. Senapati, A. Pal, A. Das* Facile synthesis of tetrahydroquinoline containing dithiocarbamate derivatives via one-pot sequential multicomponent reaction Org. Biomol. Chem. 2024, ASAP. link
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M. Konwar, N. Hazarika, B. K. Sarmah, A. Das* Ruthenium(II)-Catalyzed Oxidative Annulation of Imidazo[1,5-a]quinolin-2-iums Salts and Internal Alkynes via C−H Bond Activation Chem. Eur. J. 2024, ASAP. Link
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M. Konwar, N. Hazarika, A. Das* Ru/O2‑Catalyzed Oxidative C−H Activation/Alkyne Annulation Using Quinoline-Functionalized NHC as a Directing and Functionalizable Group Org. Lett. 2024, ASAP. Link
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M. Konwar, T. Das, A. Das* Cyclometalated Ruthenium Catalyst Enables Selective Oxidation of N‑Substituted Tetrahydroquinolines to Lactams Org. Lett. 2024, ASAP. Link
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P. Adhikari, D. Bhattacharyya, K. Deori, B. K. Sarmah, A. Das* Chemo- and Regioselective Catalytic Cross-Coupling Reaction of Ketones for the Synthesis of β, γ-Disubstituted β, γ-Unsaturated Keton Chem -Eur. J. ASAP. Link This is considered a hot paper.
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P. Adhikari, N.Hazarika, K. Bhattacharyya, A. Das* Chromium-Catalyzed Cross-Coupling of Methyl Ketones with Cyclic Ketones toward the Selective Synthesis of β‑Branched β,γ-Unsaturated Ketones Org. Lett. 2024, ASAP. Link
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M. Konwar, T. Das, A. Naskar, R. Murmu, A. Das* Facile Installation of β-Hydroxyarylethylamino Motifs at the C2-Position of Quinoline Moiety via Copper Catalysed [3+3]-Cycloaddition Reaction of N-oxide with N-Ts Aziridine Synlett. 2023, ASAP. Link
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D. Bhattacharyya, P. Adhikari, N.Hazarika, B. K. Sarmah, A. Das* Phosphine-Free Pincer Ruthenium-Catalyzed α-Alkylation of Ketones with Secondary Alcohols to form β–Branched Ketones ChemCatChem, 2023, ASAP. Link
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D. Bhattacharyya, P. Adhikari, K. Deori, A. Das Indian Patent Application No. 202231062867 dated 03.11.2022 A process for sustainable synthesis of N-heteroaromatic compounds
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D. Bhattacharyya, P. Adhikari, K. Deori, A. Das* Ruthenium pincer complex catalyzed efficient synthesis of quinoline, 2-styrylquinoline and quinazoline derivatives via acceptorless dehydrogenative coupling reactions Catal. Sci. Technol., 2022, 12, 5695-5702. Link
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D. Bhattacharyya, S. K. Senapati, A. Das* Concise Synthesis of N-Aryl Tetrahydroquinolines via a One-Pot Sequential Reduction of Quinoline/Chan–Evans–Lam Coupling Reaction Synlett. 2022, ASAP. Link Invited Article! for a special issue on "Chemical Synthesis and Catalysis in India" SYNFACTS Highlights in Chemical Synthesis, Synfacts 03012023, 19(01), 0013 Link Highlighted in Organic Chemistry Portal. Link
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B. K. Sarmah, M. Konwar, A. Das* Copper-Catalyzed Oxidative Dehydrogenative Reaction of Quinoline‑N‑Oxides with Donor−Acceptor Cyclopropanes:
Installation of a Tertiary Alkyl Motif at C2 Position Org. Lett. 2021, 23, 8390-8395. Link
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B. K. Sarmah, M. Konwar, A. Das* Site-Selective Deoxygenative Amination of Azine N-Oxides with Carbodiimides under Catalyst-, Activator-, Base-, and Solvent-Free Conditions J. Org. Chem. 2021, 86, 10762-10772. link Highlighted in Organic Chemistry Portal. Link
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P. Adhikari, D. Bhattacharyya, S. Nandi, P. K. Kancharla, A. Das* Reductive Alkylation of Quinolines to N‑Alkyl Tetrahydroquinolines Catalyzed by Arylboronic Acid Org. Lett. 2021, 23, 2437-2442. link Most Read Article for the Month of March 2021. Highlighted in Organic Chemistry Portal. Link
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D. Bhattacharyya, B. K. Sarmah, S. Nandi, H. K. Srivastava,* A. Das* Selective Catalytic Synthesis of α-Alkylated Ketones and β-Disubstituted Ketones via Acceptorless Dehydrogenative Cross-Coupling of Alcohols Org. Lett. 2021, 23, 869-875. link Highlighted in Organic Chemistry Portal. link
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C. Dash*, A. Das, H. V. R. Dias* Mercury(II) Complexes of Anionic N-HeterocyclicCarbene Ligands: Steric Effects of the Backbone Substituent Molecules 2020, 25, 3741. link
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D. Bhattacharyya, S. Nandi, P. Adhikari, B. K. Sarmah, M. Konwar, A. Das* Boric acid catalyzed chemoselective reduction of quinolines Org. Biomol. Chem. 2020, 18, 1214-1220. link
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B. K. Sarmah, M. Konwar, D. Bhattacharyya, P. Adhikari, A. Das* Regioselective Cyanation of Six‐Membered N‐Heteroaromatic Compounds Under Metal‐, Activator‐, Base‐ and Solvent‐Free Conditions Adv. Synth. Catal. 2019, 361, 5616-5625. link
From doctoral and postdoctoral studies
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N. V. Kulkarni, A. Das, S. G. Ridlen, E. Maxfield, V. A. K. Adiraju, M. Yousufuddin, H. V. R. Dias Fluorinated triazapentadienyl ligand supported ethyl zinc(ii) complexes: reaction with dioxygen and catalytic applications in the Tishchenko reaction Dalton Trans., 2016, 45, 4896– 4906. link
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A. Das, Y. Hua, M. Yousufuddin, T. R. Cundari, J. Jeon, H. V. R. Dias Gold mediated isomerisation of cyclooctyne to ring fused olefinic bicycles Eur. J. Inorg. Chem, 2016, 995– 1001. link
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N. V. Kulkarni, C. Dash, N. B. Jayaratna, S. G. Ridlen, A. Das, X. Kou, M. Yousufuddin, H. V. Rasika Dias Zinc(II) mediated carbene insertion into C-H bonds in alkanes Inorg. Chem. 2015, 54, 11043– 11045. link
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N. V. Kulkarni, A. Das, N. B. Jayaratna, M. Yousufuddin, H. V. Rasika Dias Zinc-Mediated Carbene Insertion to C-Cl Bonds of Chloromethanes and Isolable Zinc(II) Isocyanide Adducts Inorg. Chem. 2015, 54, 5151-5153. link
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A. Das, C. Dash, M. Yousufuddin, H. V. R. Dias Coordination and ligand substitution chemistry of bis(cyclooctyne)copper(I) Organometallics 2014, 33, 1644-1650. link
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J. M. Breunig, P. Gupta, A. Das, S. Tussupbayev, M. Bolte, M. Wagner, M. C. Holthausen, H.-W. Lerner Efficient Access to Substituted Silafluorenes by Nickel-Catalyzed Reactions of Biphenylenes with Et2SiH2 Chem. Asian J. 2014, 9, 3163-3173. link
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F. J. Klinke, A. Das, S. Demeshko, S. Dechert, F. Meyer Inducing Single Molecule Magnet Bahviour in a [Co4O4] Cubane via the Solvatomagnetic Effect Inorg. Chem. 2014, 53, 2976-2982. link
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A. Das, C. Dash, M. Yousufuddin, M. A. Celik, G. Frenking, H. V. R. Dias Tris(alkyne) and bis(alkyne) complexes of coinage metals: synthesis and characterization of (cyclooctyne)3M+ (M = Cu, Ag) and (cyclooctyne)2Au+ and coinage metal (M = Cu, Ag, Au) family group trends Organometallics 2013, 32, 3135-3144. Highlighted on the Organometallics Cover, Issue 11, 2013. link
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C. Dash, A. Das, M. Yousufuddin, H. V. R. Dias Isolable, copper(I) dicarbonyl complexes supported by N-heterocyclic carbenes Inorg. Chem. 2013, 52, 1584-1590. link
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M. A. Celik, C. Dash, V. A. K. Adiraju, A. Das, M. Yousufuddin, G. Frenking, H. V. R. Dias End-on and side-on-acid ligand adducts of gold(I): carbonyl, cyanide, isocyanide and cyclooctyne gold(I) complexes supported by N-heterocyclic carbenes and phosphines Inorg. Chem. 2013, 52, 729-742. link
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A. Das, C. Dash, M. Yousufuddin, M. A. Celik, G. Frenking, H. V. R. Dias Isolable tris(alkyne) and bis(alkyne) complexes of gold(I) Angew. Chem. 2012, 124, 4006-4009. Angew. Chem. Int. Ed. 2012, 51, 3940-3943. link
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A. Das, F. J. Klinke, S. Demeshko, S. Meyer, S. Dechert, F. Meyer Reversible Solvatomagnetic Effect in Novel Tetranuclear Cuban-Type Ni4 Complexes and Magnetostructural Correlations for the [Ni4(mu3-O)4] Core Inorg. Chem. 2012, 51, 8141-8149. link
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A. Das, K. Gieb, Y. Krupskaya, S. Demeshko, S. Dechert, R. Klingeler, V. Kataev, B. Buechner, P. Mueller, F. Meyer A New Family of 1D Exchange Biased Heterometal Single-Molecule Magnets: Observation of Pronounced Quantum Tunneling Steps in the Hysteresis Loops of Quasi-Linear {Mn2Ni3} Clusters' J. Am. Chem. Soc. 2011, 133, 3433-3443. link
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A. Das, A. Huebner, M. Weber, M. Bolte, H.-W. Lerner, M. Wagner 9-H-9-Borafluorene dimethyl sulphide adduct: a product of a unique ring-contraction reaction and a useful hydroboration reagent' Chem. Commun. 2011, 47, 11339-11341. link
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A. Das, S. Demeshko, S. Dechert, F. Meyer A New Triazine-Based Tricompartmental Ligand for Stepwise Assembly of Mononuclear, Dinuclear, and 1D-Polymeric Heptacoordinate Manganese(II)/Azido Complexes' Eur. J. Inorg. Chem. 2011, 1240-1248. link
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M. K. Ghorai, K. Das, A. Kumar, A. Das A convenient synthetic route to 2-aryl-N-tosylazetidines and their ZnX2 (X = I, OTf) mediated regioselective nucleophilic ring opening reactions: synthesis of γ-iodoamines and tetrahydropyrimidines Tetrahedron Lett. 2006, 47, 5393. link