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A one pot, three component synthesis of coumarin …

Room Temperature One-Pot Green Synthesis of Coumarin …

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An efficient,simple and one-pot protocol for synthesis of coumarin ..

[32] Banerjee, S., Horn, A., Khatri, H., and Sereda, G. 2011, A green one-pot multicomponent synthesis of 4H-pyrans and polysubstituted aniline derivatives of biological, pharmacological, and optical applications using silica nanoparticles as reusable catalyst, Tetrahedron Lett., 52 (16), 1878–1881.

Keywords: Acetylenic esters, 7-Hydroxy coumarin derivatives, One-pot synthesis, Triphenylphosphine

[39] Banerjee, S., and Saha, A., 2013, Free-ZnO nanoparticles: A mild, efficient and reusable catalyst for the one-pot multicomponent synthesis of tetrahydrobenzo[b]pyran and dihydropyrimidone derivatives, New J. Chem., 37 (12), 4170–4175.

Microwave-Promoted One-Pot Syntheses of Coumarin …

[29] Wu, M., Feng, Q., Wan, D., and Ma, J., 2013, CTACl as catalyst for four-component, one-pot synthesis of pyranopyrazole derivatives in aqueous medium, Synth. Commun., 43 (12), 1721–1726.

[26] Guo, R.Y., An, Z.M., Mo, L.P., Yang, S.T., Liu, H.X., Wang, S.X., Zhang, Z.H., 2013, Meglumine promoted one-pot, four-component synthesis of pyranopyrazole derivatives, Tetrahedron, 69 (47), 9931–9938.

Unexpected one-pot synthesis of new polycyclic coumarin…

[22] Saha, A., Payra, S., and Banerjee, S., 2015, One-pot multicomponent synthesis of highly functionalized bio-active pyrano[2,3-c]pyrazole and benzylpyrazolyl coumarin derivatives using ZrO2 nanoparticles as a reusable catalyst, Green Chem., 17 (5), 2859–2866.

[42] Bararjanian, M., Balalaei, S., Movassag, B., and Amani, A.M., 2009, One-pot synthesis of pyrano[2, 3-d]pyrimidinone derivatives catalyzed by L-proline in aqueous media, J. Iran. Chem. Soc., 6 (2), 436–442.

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  • Methods for the Synthesis of Coumarin Derivatives, ..

    A mild and green method has been developed for the preparation of coumarins derivatives through the one-pot reactions

  • Derivatives Using Glutamic Acid Under Solvent ..

    01/06/2016 · Synthesis of 3-carboxylated Coumarins by Knoevenagel Condensation and ..

  • Acid Under Solvent-Free Conditions.

    Microwave Assisted Convenient One-Pot Synthesis of ..

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One-Pot Synthesis of Alkyl 4-alkyl-2,8-dioxo-2H,8H …

A simple, facile, and convenient practical method for the room temperature one-pot synthesis of a series of potentially biologically active coumarin-3-carboxylic acids has been developed in water from the Knoevenagel condensation and intramolecular cyclization of diverse 2-hydroxybenzaldehydes with Meldrum’s acid using either potassium carbonate or sodium azide as a commercially available, cheap, and eco-friendly catalyst. The salient features of the present protocol are mild reaction conditions, good to excellent yields, high atom-economy, environmentally benignity, easy isolation of products, without column chromatography, clean reaction profiles, and applicability toward large-scale synthesis.

Easy Access to Coumarin Derivatives Using Alumina …

Potassium carbonate or sodium azide catalyzed one-pot synthesis of coumarin-3-carboxylic acids has been developed via Knoevenagel condensation and intramolecular cyclization of diverse 2-hydroxybenzaldehydes with Meldrum’s acid in water at room temperature.

05/06/2012 · Journal of Chemistry is ..

Ghosh et al. 37 have been reported a glacial acetic acid catalyzed reaction for the combinatorial synthesis of highly functionalized benzylpyrazolyl coumarin 85 prepared by a green one-pot four-component reaction between aryl hydrazine/ hydrazine hydrate 81, ethyl acetoacetate 82, aromatic aldehydes 83 and 4-hydroxycoumarin 84 in water medium under refluxing conditions.

Easy Access to Coumarin Derivatives Using Alumina ..

[3] Mohamadpour, F., Maghsoodlou, M.T., Heydari, R., and Lashkari, M., 2016, Copper(II) acetate monohydrate: An efficient and eco-friendly catalyst for the one-pot multi-component synthesis of biologically active spiropyrans and 1H-pyrazolo[1,2-b]phthalazine-5,10-dione derivatives under solvent-free conditions, Res. Chem. Intermed., 42 (12), 7841–7853.

PEG Mediated Eco-Friendly One Pot Sunthesis of …

Kadam et al. 34 have been repoted a novel synthesis of 3-amino-4-(4I-substituted benzylidene) - 1H-pyrazol-5(4H)-one derivatives 72 and 3-amino-4-(4I-substitued benzylidene) - 4, 5 - dihydro-5-oxopyrazole-1-carbothioamide derivatives 73 by the reaction of substituted benzaldehyde/ heteroaldehyde 70, ethylcyano acetate 71 and thiosemicarbazide was heated in presence of PEG-400.

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