Browsing by Author "Malakar, C.C."

Filter results by typing the first few letters
Now showing 1 - 3 of 3
  • No Thumbnail Available
    Item
    Biomass-Derived Reaction Media Towards the Iodination of Anilines Under the Catalytic Influence of Magnetically Separable Pd@rGO-CuFe2O4
    (Bentham Science Publishers, 2025) Reetu, R.; Teli, Y.A.; Patel, M.J.; Keremane, K.S.; Dutta, S.; Malakar, C.C.; Almeer, R.
    Investigation of a biomass-derived solvent, such as ?-valerolactone (GVL), for the iodination of anilines was devised. The process is accomplished under the catalytic influence of a magnetically separable Pd@rGO-CuFe2O4catalyst (with 0.00047 mol% Pd loading) at 25°C. The catalyst is recovered from the reaction medium using an external magnet and recycled for five consecutive reaction cycles with very minor catalyst leaching. The developed strategy has been thoroughly studied over a series of starting materials to obtain the iodoaniline derivatives, and the desired products were obtained effectively in yields up to 91% with high regioselectivity. A plausible reaction mechanism was proposed based on previous findings. This method has been extended to gram-scale synthesis with a 76% yield of the desired product. © 2025 Bentham Science Publishers
  • No Thumbnail Available
    Item
    Synthesis and Characterization of Novel Pd@rGO−CuFe2O4 Magnetic Nanoparticles: A Recyclable Catalyst for C−C Coupling Reaction in Biomass-Derived Organic Solvent
    (John Wiley and Sons Inc, 2023) Teli, Y.A.; Reetu, R.; Singh, P.G.; Patel, M.J.; Dash, S.; Paine, S.; Prabhakar, P.S.; Singh, V.; Keremane, K.S.; Al-Zaqri, N.; Mukherjee, K.; Dutta, S.; Malakar, C.C.
    Development of new, cost effective, stable heterogeneous catalyst for the organic transformations is an important thematic area of research. Present work describes the development of new Pd@rGO−CuFe2O4 catalyst and demonstrates its effectiveness for Suzuki-Miyaura type coupling reactions. The additional advantage of this reaction is its feasibility using biomass-derived solvent like γ-Valerolactone (GVL) in aqueous media. The catalyst is prepared hydrothermally and characterized using XRD, FESEM, EDX, and XPS analysis. The catalyst exhibits excellent activity and recyclability (up to six times) in the C−C coupling reaction to deliver the corresponding biaryl molecules in yields up to 90 %. High efficiency for the conversion of nitriles to amides is also revealed by the prepared catalyst. © 2023 Wiley-VCH GmbH.
  • No Thumbnail Available
    Item
    The γ-Valerolactone (GVL) as Innoxious Reaction Media for the Synthesis of 2-Aryl-2H-Indazoles via C-N and N-N Bond Formation under Cu(I)-Catalyzed Ligand and Base Free Conditions
    (Taylor and Francis Ltd., 2024) Singh, L.S.; Kant, K.; Banerjee, S.; Sengupta, R.; AlObaid, A.A.; Pal, M.; Dutta, S.; Aljaar, N.; Malakar, C.C.
    An efficient method for N-arylation and N-N bond formation has been developed using an innoxious reaction medium, γ-valerolactone (GVL), as both a solvent and a ligand. The strategy involves utilizing CuI as a catalyst under conditions free of external ligands and bases. Various aldehyde and amine derivatives with different functional groups were investigated, resulting in the production of 2-aryl-2H-indazole compounds with yields ranging from 75% to 93%. This study highlights the effectiveness of GVL, a solvent derived from biomass, as a reaction medium and ligand in a multicomponent reaction. © 2023 Taylor & Francis Group, LLC.