Articles with "base free" as a keyword



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Mechanistic Studies on Ruthenium(II)-Catalyzed Base-Free Transfer Hydrogenation Triggered by Roll-Over Cyclometalation.

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Published in 2017 at "ChemPlusChem"

DOI: 10.1002/cplu.201600526

Abstract: The synthesis of 2-substituted pyridine-pyrimidine ligands and their complexation with arene ruthenium(II) chloride moieties is reported. Depending on the electronic and steric influences of the ligand, the catalysts undergo CH activation by roll-over cyclometalation. This… read more here.

Keywords: cyclometalation; base free; transfer hydrogenation; roll cyclometalation ... See more keywords
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Pt and Pt/Sn carbonyl clusters as precursors for the synthesis of supported metal catalysts for the base-free oxidation of HMF

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Published in 2019 at "Applied Catalysis A: General"

DOI: 10.1016/j.apcata.2019.117279

Abstract: Abstract In the present work, Pt and Pt/Sn nanoparticles (NPs), synthesized from carbonyl cluster precursors were deposited on TiO2 and the resulting materials were tested as catalysts in selective oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic… read more here.

Keywords: carbonyl clusters; clusters precursors; oxidation; base free ... See more keywords
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The interplay of Au nanoparticles and ZnO nanorods for oxygen-promoted, base-free, complete formaldehyde reforming into H2 and CO2

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Published in 2018 at "Catalysis Communications"

DOI: 10.1016/j.catcom.2018.08.015

Abstract: Abstract Au nanoparticles on ZnO nanorods is a sustainable catalyst for oxygen-promoted, base-free, complete formaldehyde reforming into H2 and CO2 at low temperatures. The strong metal-support interaction (SMSI) between Au and ZnO is suggested to… read more here.

Keywords: free complete; oxygen promoted; nanoparticles zno; base free ... See more keywords
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Base-free CO2 hydrogenation to formic acid over Pd supported on defective carbon nitride modified by microwave and acid treatments

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Published in 2021 at "Journal of Catalysis"

DOI: 10.1016/j.jcat.2021.03.016

Abstract: Abstract Graphitic carbon nitride (g-C3N4) is synthesized via pyrolyzing urea by hybrid microwave annealing (HMA) to support Pd catalyst for direct CO2 hydrogenation to formic acid under a base-free condition. The HMA produces fragmented C3N4… read more here.

Keywords: formic acid; base free; hydrogenation formic; carbon nitride ... See more keywords
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Hydration of Nitriles Catalyzed by Ruthenium Complexes: Role of Dihydrogen Bonding Interactions in Promoting Base-Free Catalysis.

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Published in 2022 at "Inorganic chemistry"

DOI: 10.1021/acs.inorgchem.2c02058

Abstract: Ru(II) complexes of amide-phosphine-based tridentate ligands additionally containing pyridine, isoquinoline, and quinoline rings have been synthesized, and their catalytic utility for the selective hydration of nitriles to amides is explored under the base-containing as well… read more here.

Keywords: hydration nitriles; hydration; dihydrogen bonding; base free ... See more keywords
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Ambient-Pressure and Base-Free Aldehyde Hydrogenation Catalyst Supported by a Bifunctional Abnormal NHC Ligand

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Published in 2018 at "Organometallics"

DOI: 10.1021/acs.organomet.8b00729

Abstract: Catalytic aldehyde hydrogenation is an essential and routinely used chemical synthesis process in both academia and industry. However, there is a serious scarcity of efficient homogeneous catalysts for this process to work under highly demanding… read more here.

Keywords: hydrogenation; base free; base; pressure base ... See more keywords
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Enantioselective α-Chlorination Reactions of in Situ Generated C1 Ammonium Enolates under Base-Free Conditions

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Published in 2021 at "Organic Letters"

DOI: 10.1021/acs.orglett.1c02256

Abstract: The asymmetric α-chlorination of activated aryl acetic acid esters can be carried out with high levels of enantioselectivities utilizing commercially available isothiourea catalysts under base-free conditions. The reaction, which proceeds via the in situ formation… read more here.

Keywords: free conditions; base free; enantioselective chlorination; ammonium enolates ... See more keywords
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Manganese Pincer Complexes for the Base-Free, Acceptorless Dehydrogenative Coupling of Alcohols to Esters: Development, Scope, and Understanding

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Published in 2017 at "ACS Catalysis"

DOI: 10.1021/acscatal.6b03554

Abstract: Aliphatic PNP pincer-supported earth-abundant manganese(I) dicarbonyl complexes behave as effective catalysts for the acceptorless dehydrogenative coupling of a wide range of alcohols to esters under base-free conditions. The reaction proceeds under neat conditions, with modest… read more here.

Keywords: alcohols esters; base free; acceptorless dehydrogenative; dehydrogenative coupling ... See more keywords
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Base-Free Synthesis and Photophysical Properties of New Schiff Bases Containing Indole Moiety

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Published in 2022 at "ACS Omega"

DOI: 10.1021/acsomega.1c06636

Abstract: Schiff bases represent an essential class in organic chemistry with antitumor, antiviral, antifungal, and antibacterial activities. The synthesis of Schiff bases requires the presence of an organic base as a catalyst such as piperidine. Base-free… read more here.

Keywords: schiff; synthesis; base free; catalyst ... See more keywords
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Base-Free Iron Hydrosilylene Complexes via an α-Hydride Migration that Induces Spin Pairing.

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Published in 2018 at "Journal of the American Chemical Society"

DOI: 10.1021/jacs.8b01185

Abstract: Two new base-free hydrosilylene complexes of iron were synthesized using the novel starting material Cp*( iPr2MeP)FeMes. These Cp*( iPr2MeP)Fe(H)SiHR (R = DMP, Trip) complexes are in equilibrium with the corresponding iron silyl complexes, Cp*( iPr2MeP)FeSiH2R,… read more here.

Keywords: base free; hydrosilylene complexes; free iron;
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AuPd-nNiO as an effective catalyst for the base-free oxidation of HMF under mild reaction conditions

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Published in 2019 at "Green Chemistry"

DOI: 10.1039/c9gc01283d

Abstract: AuPd nanoparticles supported on NiO exhibit high activity and stability in the base free oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA). read more here.

Keywords: base free; aupd nnio; hmf; free oxidation ... See more keywords