Výsledky vyhledávání - "Manjulla Gupta"

Copper (0) nanoparticles onto silica: A stable and facile catalyst for one-pot synthesis of 2,2′-arylmethylene bis (3-hydroxy-5,5-dimethyl-2-cyclohexene-1-one) via cascade Knoevenagel/Michael reaction

Autor: Monika Gupta, Manjulla Gupta

Publikováno v: Journal of Chemical Sciences. 128:849-854

Solid supported copper (0) nanoparticles were prepared by physical adsorption of copper (0) nanoparticles (synthesized through bottom-up approach) on the solid supports such as silica, HAP, cellulose and basic alumina. Studies comparing these support

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bb87fb3ae3c94d296443c464a7e59960
https://doi.org/10.1007/s12039-016-1080-6

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Doping of copper (I) oxide onto a solid support as a recyclable catalyst for acetylation of amines/alcohols/phenols and synthesis of trisubstituted imidazole

Autor: Monika Gupta, Manjulla Gupta

Publikováno v: Journal of the Iranian Chemical Society. 13:231-241

A study of copper-mediated C–heteroatom especially C–N and C–O bond formations using simpler methodologies has been carried out. In the present work, acetylation of various substrates such as amines, phenols and alcohols; synthesis of 2,4,5-tri

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::93b71ff0abf402fef00646b0e35bb52b
https://doi.org/10.1007/s13738-015-0730-9

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Silica functionalized Cu(II) catalysed selective oxidation of benzyl alcohols using TEMPO and molecular oxygen as an oxidant

Autor: Pankaj Sharma, Manjulla Gupta, Rajive Gupta, Monika Gupta

Publikováno v: Journal of Chemical Sciences. 127:1485-1489

A general scheme for the oxidation of benzyl alcohols catalyzed by silica functionalized copper (II) has been designed. TEMPO, a free radical, assists this oxidation that was initiated by molecular oxygen which converts it to a primary oxidant. This

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cd947ed063fd49dfb33384729fa4dcdb
https://doi.org/10.1007/s12039-015-0902-2

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SiO2-Diphenic acid: An efficient and recyclable heterogeneous catalyst for one-pot synthesis of bis-(indolyl)methane derivatives in liquid phase

Autor: Rupali Vaid, Omkar Singh Chambyal, Manjulla Gupta, Rajive Gupta

Publikováno v: Journal of Chemical Sciences. 127:987-997

An eco-friendly and expedient procedure for one-pot synthesis of bis-(indolyl)methane derivatives via electrophilic substitution reaction at C-3 position of indole with various aldehydes has been developed by using silica-diphenic acid as a novel het

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a4a69b2d9dda84111f1bb8f218ce3c60
https://doi.org/10.1007/s12039-015-0859-1

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Salicyldimine-based Schiff's complex of copper(ii) as an efficient catalyst for the synthesis of nitrogen and oxygen heterocycles

Autor: Monika Gupta, Vivek K. Gupta, Manjulla Gupta, Rajnikant

Publikováno v: New Journal of Chemistry. 39:3578-3587

In the present paper, we have reported the synthesis of an imine-based silica-functionalized copper(II) catalyst using salicyldehyde as a ligand. Furthermore, the catalyst is characterized through various spectroscopic techniques, namely FTIR, XRD, T

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::68848fdc3259e27f7b597e4daa509d31
https://doi.org/10.1039/c4nj02391a

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One-pot synthesis of 1,4-disubstituted 1,2,3-triazoles via Huisgen 1,3-dipolar cycloaddition catalysed by SiO2–Cu(I) oxide and single crystal X-ray analysis of 1-benzyl-4-phenyl-1H-1,2,3-triazole

Autor: Rajni Kant, Manjulla Gupta, Satya Paul, Vivek K. Gupta, Monika Gupta

Publikováno v: Monatshefte für Chemie - Chemical Monthly. 146:143-148

A one-pot synthesis of 1,4-disubstituted 1,2,3-triazoles via Huisgen 1,3-dipolar cycloaddition reaction between terminal alkynes, benzyl/allyl/alkyl halides, and NaN3 in water at room temperature using silica-supported copper(I) oxide (SiO2–Cu2O) h

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e3b3e395bd2d0da52aaa45b3f239768c
https://doi.org/10.1007/s00706-014-1285-7

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SiO2-Cu2O: An efficient and recyclable heterogeneous catalyst for N-benzylation of primary and secondary amines

Autor: Rajive Gupta, Satya Paul, Manjulla Gupta

Publikováno v: Chinese Journal of Catalysis. 35:444-450

A mild, effective, and selective procedure is reported for the mono N -benzylation and N , N -dibenzylation of primary amines as well as mono N -benzylation of secondary amines using silica-supported copper(I) oxide in water. The silica-supported Cu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5a10f2eabdf5dd88938b3983e114d448
https://doi.org/10.1016/s1872-2067(14)60009-7

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ChemInform Abstract: Copper(0) Nanoparticles onto Silica: A Stable and Facile Catalyst for One-Pot Synthesis of 2,2′-Arylmethylene Bis(3-hydroxy-5,5-dimethyl-2-cyclohexene-1-one) via Cascade Knoevenagel/Michael Reaction

Autor: Monika Gupta, Manjulla Gupta

Publikováno v: ChemInform. 47

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cac9cd1e0d42b4809a4c584c5f486465
https://doi.org/10.1002/chin.201642099

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