Hydrogen Bonding and Internal or External Lewis or Brønsted Acid Assisted (Thio)urea Catalysts
Sign Up to like & getrecommendations! Published in 2019 at "European Journal of Organic Chemistry"
DOI: 10.1002/ejoc.201901344
Abstract: This work was supported by a 2018 Leonardo Grant for Researchers and Cultural Creators, BBVA Foundation. The authors also thank Ministerio de Economia, Industria y Competitividad (MINECO‐FEDER CTQ2016‐75816‐C2‐1‐P and CTQ2017‐88091‐P) and Gobierno de Aragon‐Fondo Social… read more here.
Keywords: nsted acid; lewis nsted; external lewis; bonding internal ... See more keywords
The acid strength of the HF/AlX3 Lewis-Brønsted complexes involving various electron acceptors as ligands
Sign Up to like & getrecommendations! Published in 2019 at "Chemical Physics Letters"
DOI: 10.1016/j.cplett.2018.12.015
Abstract: Abstract The acid strength of the datively bound HF → AlX3 complexes (X H, F, N3, CH3, CH CH2, C CH, C6H5, CN, CF3, OF, SH, SF, NCO, NCS, OCF3, and OSF5) is evaluated on the basis… read more here.
Keywords: strength alx3; alx3; acid strength; alx3 lewis ... See more keywords
Thiopyrylium Scaffolds from the Lewis/Brønsted-Acid-Promoted Cyclization of Thioethers.
Sign Up to like & getrecommendations! Published in 2020 at "Organic letters"
DOI: 10.1021/acs.orglett.0c02292
Abstract: A series of acene- or heteroacene-fused thiopyrylium salts was synthesized from diarylthioethers that contain formyl groups via an intramolecular Friedel-Crafts cyclization. The reaction, promoted by a Lewis or Brønsted acid, afforded the new thiopyrylium salts… read more here.
Keywords: thiopyrylium salts; nsted acid; lewis nsted; cyclization ... See more keywords
Modulation of Lewis and Brønsted Acidic Sites to Enhance the Redox Ability of Nb2O5 Photoanodes for Efficient Photoelectrochemical Performance.
Sign Up to like & getrecommendations! Published in 2023 at "ACS applied materials & interfaces"
DOI: 10.1021/acsami.2c23284
Abstract: Accelerated surface redox reaction and regulated carrier separation are the crux to the development of highly reactive oxide semiconductors for efficient photoelectrochemical water splitting. Here, we have selected Nb2O5 materials that combine unique surface acidity… read more here.
Keywords: ability; nsted acidic; surface; efficient photoelectrochemical ... See more keywords
Asymmetric Hydrogenation of Oximes Synergistically Assisted by Lewis and Brønsted Acids.
Sign Up to like & getrecommendations! Published in 2022 at "Journal of the American Chemical Society"
DOI: 10.1021/jacs.2c07506
Abstract: Due to their low reactivity, difficult enantiocontrol, and proneness to N-O bond cleavage, the catalytic asymmetric hydrogenation of oximes to hydroxylamines has remained a significant challenge. Herein, a Lewis and Brønsted acid cooperation strategy was… read more here.
Keywords: asymmetric hydrogenation; nsted acid; oximes synergistically; hydrogenation oximes ... See more keywords
Lewis/Brønsted acid-mediated cyclization/amidation of 1,6-enynes with nitriles: access to 3-enamide substituted dihydrobenzofurans.
Sign Up to like & getrecommendations! Published in 2023 at "Chemical communications"
DOI: 10.1039/d3cc00787a
Abstract: A novel Lewis- and Brønsted-acid mediated electrophilic addition cyclization/amidation reaction of 1,6-enynes with nitriles to synthesize 3-enamide-substituted dihydrobenzofurans has been developed. The transformation involves the addition of a Brønsted acid as the electrophilic reagent to… read more here.
Keywords: lewis nsted; acid mediated; nsted acid; cyclization ... See more keywords
Catalytic Lewis and Brønsted acid syn-diastereoselective benzylic substitutions of α-hydroxy-β-nitro- and α-hydroxy-β-azido-alkyl arenes
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DOI: 10.1139/cjc-2020-0016
Abstract: A series of alkyl and alkenyl p-methoxy arenes containing α,β-disubstituted diamino and amino alcohol groups were synthesized from β-nitro and β-azido benzylic alcohols in the presence of AuCl3 as ... read more here.
Keywords: alkyl; catalytic lewis; nsted acid; lewis nsted ... See more keywords