Articles with "acid promoted" as a keyword



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Acid promoted Ni/NiO monolithic electrode for overall water splitting in alkaline medium

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Published in 2017 at "Science China Materials"

DOI: 10.1007/s40843-017-9089-y

Abstract: Exploring and designing bi-functional catalysts with earth-abundant elements that can work well for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline medium are of significance for producing clean fuel to relieve… read more here.

Keywords: alkaline medium; acid promoted; monolithic electrode; electrode ... See more keywords

Lewis acid promoted anomerisation of alkyl O- and S-xylo-, arabino- and fucopyranosides.

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Published in 2019 at "Carbohydrate research"

DOI: 10.1016/j.carres.2018.11.010

Abstract: Pentopyranoside and 6-deoxyhexopyranosides, such as those from d-xylose, l-arabinose and l-fucose are components of natural products, oligosaccharides or polysaccharides. Lewis acid promoted anomerisation of some of their alkyl O- and S-glycopyranosides is reported here. SnCl4… read more here.

Keywords: promoted anomerisation; acid promoted; lewis acid; anomerisation alkyl ... See more keywords
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Lewis acid-promoted cascade reaction for the synthesis of Michael acceptors and its application in a dimerization reaction

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Published in 2017 at "Tetrahedron"

DOI: 10.1016/j.tet.2017.05.017

Abstract: Abstract An efficient Lewis acid-promoted cascade reaction with dimethyl sulfoxide as a methylene source for the synthesis of Michael acceptors is reported. The key to developing this procedure is the selection of a mild base… read more here.

Keywords: michael; lewis acid; cascade reaction; promoted cascade ... See more keywords
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Influence of acyl groups on glucopyranoside reactivity in Lewis acid promoted anomerisation

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Published in 2018 at "Tetrahedron Letters"

DOI: 10.1016/j.tetlet.2018.05.076

Abstract: Abstract Lewis acid promoted anomerisation has potential in O- or S-glycoside synthesis. Herein, the anomerisation kinetics of thirty-one β- d -glucopyranosides was determined to determine how particular acyl protecting groups and their location influence reactivity… read more here.

Keywords: promoted anomerisation; acid promoted; lewis acid; reactivity ... See more keywords

Brønsted acid promoted C–C bond formation between indolylmethyl electrophiles and ketene dithioacetals: Diastereoselective synthesis of highly functionalized cyclopenta[b]indoles

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Published in 2020 at "Tetrahedron Letters"

DOI: 10.1016/j.tetlet.2020.152349

Abstract: Abstract A Bronsted-acid promoted method for the construction of carbon-carbon bonds between α-substituted indolylmethyl electrophiles and ketene dithioacetals is described. This strategy was utilized to access 2,3-disubstituted cyclopenta[b]indoles via formal [3+2] cycloadditions. Readily available indolyl… read more here.

Keywords: carbon; indolylmethyl electrophiles; cyclopenta indoles; acid promoted ... See more keywords
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Acid-promoted Ir-La-S/AC-catalyzed methanol carbonylation on single atomic active sites

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Published in 2018 at "Chinese Journal of Catalysis"

DOI: 10.1016/s1872-2067(18)63019-0

Abstract: Abstract Highly active Ir-La-S/AC catalyst was successfully prepared by co-impregnation of an activated carbon (AC) carrier with a sulfuric acid solution of Ir and La species and compared with a traditionally prepared Ir-La/AC catalyst. High… read more here.

Keywords: methanol; promoted catalyzed; carbonylation; single atomic ... See more keywords
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Lewis Acid Promoted Vicinal Oxytrifluoromethylselenolation of Alkenes.

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Published in 2023 at "Organic letters"

DOI: 10.1021/acs.orglett.3c00846

Abstract: Herein, we have developed a metal-free, Lewis acid promoted vicinal oxytrifluoromethylselenolation of alkenes using trifluoromethyl selenoxides as electrophilic trifluoromethylselenolation reagents and alcohols as nucleophiles. With less steric and good nucleophilic solvents (such as ethanol and… read more here.

Keywords: oxytrifluoromethylselenolation alkenes; oxytrifluoromethylselenolation; acid promoted; promoted vicinal ... See more keywords
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Lewis Acid Promoted Deprotection of Benzylidene Acetals and p-Methoxybenzyl Ethers with Mercaptoacid Acid as Scavenger.

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Published in 2023 at "Organic letters"

DOI: 10.1021/acs.orglett.3c00958

Abstract: We demonstrate a new and high-yielding method for removal of benzylidene acetals and para-methoxybenzyl ethers under catalytic conditions (BF3:OEt2 orFeCl3, 10 mol%) with mercaptoacetic acid as a scavenger. The reaction coproducts are converted to water-soluble… read more here.

Keywords: benzylidene acetals; acid promoted; methoxybenzyl ethers; lewis acid ... See more keywords
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Boronic acid-promoted site-selective Fischer esterifications of sugar alcohols

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Published in 2019 at "Green Chemistry"

DOI: 10.1039/c9gc00901a

Abstract: Phenylboronic acid mediates selective monoesterifications of sugar alcohols by direct condensation with fatty acids, providing access to useful, bio-derived amphiphiles. read more here.

Keywords: promoted site; acid promoted; acid; sugar alcohols ... See more keywords
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An acid-promoted pseudocine substitution manifold of γ-aminocyclopentenone enables divergent access to polycyclic indole derivatives.

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Published in 2022 at "Chemical communications"

DOI: 10.1039/d1cc06883k

Abstract: We demonstrated γ-aminocyclopentenones to be a suitable surrogate for reactive cyclopentadienone via a pseudocine-substitution manifold. This approach enabled its orchestrated annulation with "tailored" bis-nucleophiles and to furnish complex β,γ-annulated cyclopentanoids or indole-based polycyclic architectures. This… read more here.

Keywords: substitution manifold; promoted pseudocine; pseudocine substitution; manifold aminocyclopentenone ... See more keywords
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Brønsted acid-promoted hydroamination of unsaturated hydrazones: access to biologically important 5-arylpyrazolines

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Published in 2021 at "RSC Advances"

DOI: 10.1039/d1ra03043d

Abstract: An efficient, chemo- and regioselective Brønsted acid-promoted hydroamination reaction of hydrazone-tethered olefins towards 5-arylpyrazolines was developed. read more here.

Keywords: unsaturated hydrazones; promoted hydroamination; hydroamination unsaturated; acid promoted ... See more keywords