Tungstic acid-functionalized MCM-41 as a novel mesoporous solid acid catalyst for the one-pot synthesis of new pyrrolo[2,1-a]isoquinolines
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DOI: 10.1039/c8nj02699h
Abstract: Tungstic acid-functionalized MCM-41 (MCM-41–HWO4) was prepared, characterized and applied as a reusable mesoporous catalyst for the one-pot synthesis of new pyrrolo[2,1-a]isoquinoline derivatives. The characterization was performed using FT-IR, X-ray diffraction patterns (XRD), scanning electron microscopy… read more here.
Keywords: catalyst; acid functionalized; functionalized mcm; tungstic acid ... See more keywords
An efficient and eco-compatible multicomponent synthesis of 2,4,5-trisubstituted imidazole derivatives using modified-silica-coated cobalt ferrite nanoparticles with tungstic acid.
Sign Up to like & getrecommendations! Published in 2023 at "Dalton transactions"
DOI: 10.1039/d2dt03021g
Abstract: The aim of this study has been to offer a method for the synthesis of 2,4,5-trisubstituted imidazole derivatives based on green chemistry principles. Therefore, a one-pot multicomponent cyclocondensation reaction through aldehyde interaction with ammonium acetate… read more here.
Keywords: synthesis trisubstituted; efficient eco; imidazole derivatives; tungstic acid ... See more keywords
Tungstic acid-functionalized polycalix[4]resorcinarene as a cavity-containing hyper-branched supramolecular and recoverable acidic catalyst in 4H-pyran synthesis
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DOI: 10.1039/d3ra00804e
Abstract: In this study, tungstic acid immobilized on polycalix[4]resorcinarene, PC4RA@SiPr–OWO3H, as a mesoporous acidic solid catalyst was synthesized and investigated for its catalytic activity. Polycalix[4]resorcinarene was prepared via a reaction between formaldehyde and calix[4]resorcinarene, and then… read more here.
Keywords: catalyst; spectroscopy; microscopy; polycalix resorcinarene ... See more keywords
Enhanced dielectric properties of Ba3ZnTa2−xNbxO9 in microwave region using tungstic acid
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DOI: 10.1080/01411594.2019.1696464
Abstract: ABSTRACT Dielectric resonators belonging to the families of complex perovskite Ba3ZnTa2−xNbxO9 were synthesized by a solid-state reaction route. Calcination at 1250°C leads to oxides with ordered (hexagonal) perovskite structure over the range (0.25 ≤ x ≤ 1.75). However, ordering… read more here.
Keywords: dielectric properties; ba3znta2 xnbxo9; tungstic acid; enhanced dielectric ... See more keywords