Zobrazeno 1 - 10 of 14 pro vyhledávání: '"Jan Lorkowski"'
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Akademický článek
Efficient synthetic protocols for the preparation of common N-heterocyclic carbene precursors
Autor: Morgan Hans, Jan Lorkowski, Albert Demonceau, Lionel Delaude
Publikováno v: Beilstein Journal of Organic Chemistry, Vol 11, Iss 1, Pp 2318-2325 (2015)
The one-pot condensation of glyoxal, two equivalents of cyclohexylamine, and paraformaldehyde in the presence of aqueous HBF4 provided a straightforward access to 1,3-dicyclohexylimidazolium tetrafluoroborate (ICy·HBF4). 1,3-Dibenzylimidazolium tetr
Externí odkaz: https://doaj.org/article/40146a5f02eb4d6f805aeb77a227c5b5
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2
Highly Robust and Efficient Blechert-Type Cyclic(alkyl)(amino)carbene Ruthenium Complexes for Olefin Metathesis
Autor: Antonio Del Vecchio, Jakub Talcik, Sophie Colombel-Rouen, Jan Lorkowski, Melinda R. Serrato, Thierry Roisnel, Nicolas Vanthuyne, Guy Bertrand, Rodolphe Jazzar, Marc Mauduit
Publikováno v: ACS Catalysis
ACS Catalysis, 2023, 13 (9), pp.6195-6202. ⟨10.1021/acscatal.3c01208⟩
International audience; New Blechert-type ruthenium complexes containing cyclic(alkyl)(amino)carbene (CAAC) ligands are reported. These catalysts demonstrate remarkable thermal stability in solution and excellent catalytic performances at low catalyt
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3e82db379592d39fa5621dbcf60c8905
https://doi.org/10.1021/acscatal.3c01208
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3
Circularly Polarized Luminescence from Cyclic (Alkyl)(Amino) Carbene Derived Propellers
Autor: Jan Lorkowski, Dylan Bouetard, Patrick Yorkgitis, Milan Gembicky, Thierry Roisnel, Nicolas Vanthuyne, Dominik Munz, Ludovic Favereau, Guy Bertrand, Marc Mauduit, Rodolphe Jazzar
Publikováno v: Angewandte Chemie International Edition
Angewandte Chemie International Edition, 2023, pp.e202305404. ⟨10.1002/anie.202305404⟩
International audience; Organic circularly polarized luminescence (CPL)-active molecular emitters featuring dynamic propeller-like luminophores were prepared in one step from cyclic(alkyl)(amino) carbenes (CAACs). These molecules exhibit through-spac
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7169458ded94b3869fcb9a808bed3d8c
https://hal.science/hal-04120149
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4
A Straightforward Access to Cyclic (Alkyl)(amino)carbene Copper (I) Complexes
Autor: Jan Lorkowski, Melinda R. Serrato, Milan Gembicki, Marc Mauduit, Guy Bertrand, Rodolphe Jazzar
Publikováno v: European Journal of Inorganic Chemistry
European Journal of Inorganic Chemistry, 2023, pp.e202300074. ⟨10.1002/ejic.202300074⟩
International audience; The synthesis and characterization of cyclic (alkyl)(amino)carbene, bicyclic (alkyl)(amino)carbene and cyclic (amino)(barrelene)carbene copper (I) complexes is reported. These complexes are obtained via a scalable, versatile,
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e6bc8232fa0834f43c6132c3f84d4bbe
https://hal.science/hal-04087531
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5
Cyclic(alkyl)(amino)carbene ruthenium complexes for Z-stereoselective (asymmetric) olefin metathesis
Autor: Jennifer Morvan, François Vermersch, Jan Lorkowski, Jakub Talcik, Thomas Vives, Thierry Roisnel, Christophe Crévisy, Nicolas Vanthuyne, Guy Bertrand, Rodolphe Jazzar, Marc Mauduit
Publikováno v: Catalysis Science & Technology
Catalysis Science & Technology, 2023, 13, pp.381-388. ⟨10.1039/d2cy01795d⟩
International audience; The first Z-stereoselective catechodithiolate ruthenium complexes containing cyclic(alkyl)(amino)carbene ligands are reported. Isolated in nearly quantitative yields or in situ generated, these catalysts demonstrated remarkabl
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2a994bba8b4e9281e05b38d12f194175
https://hal.science/hal-03885100/document
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6
Metal-Catalyzed Metathesis of Fluorinated Alkenes: Still a Current Major Challenge
Autor: Xavier Pannecoucke, Augustin Nouaille, Samuel Couve-Bonnaire, Jan Lorkowski, Marc Mauduit, Thomas Poisson
Publikováno v: ACS Catalysis
ACS Catalysis, 2021, 11 (19), pp.12307-12323. ⟨10.1021/acscatal.1c03414⟩
ACS Catalysis, American Chemical Society, 2021, 11 (19), pp.12307-12323. ⟨10.1021/acscatal.1c03414⟩
International audience; Whereas the olefin metathesis is recognized as a powerful tool to produce alkene, the use of fluoroalkenes in metathesis-catalyzed reactions still remains a major current challenge. Herein, we presented the main developments i
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::38fd23b04062bf42a7ffbb23e5be1be1
https://doi.org/10.1021/acscatal.1c03414
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7
The Influence of C(sp 3 )H–Selenium Interactions on the 77 Se NMR Quantification of the π‐Accepting Properties of Carbenes
Autor: Guy Bertrand, Rodolphe Jazzar, Cezary Pietraszuk, Cory M. Weinstein, Jan Lorkowski, Glen P. Junor
Publikováno v: Angewandte Chemie. 132:22212-22217
Selenium NMR has become a standard tool for scaling the π-accepting character of carbenes. Herein, we highlight that non-classical hydrogen bonding (NCHB), likely resulting from hyperconjugation, can play a significant role in the carbene-selenium 7
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::995b0ec7c2dd22be12ece58beb999c43
https://doi.org/10.1002/ange.202010744
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8
Intramolecular Ring‐Expansion Reaction (RER) and Intermolecular Coordination of In Situ Generated Cyclic (Amino)(aryl)carbenes (cAArCs)
Autor: Jan Lorkowski, Cezary Pietraszuk, Udo Radius, Maciej Kubicki, Mirjam J. Krahfuß
Publikováno v: Chemistry (Weinheim an Der Bergstrasse, Germany)
Cyclic (amino)(aryl)carbenes (cAArCs) based on the isoindoline core were successfully generated in situ by α‐elimination of 3‐alkoxyisoindolines at high temperatures or by deprotonation of isoindol‐2‐ium chlorides with sodium or copper(I) ac
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6cb334950c101a39741f7b49cade2571
https://doi.org/10.1002/chem.201902630
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9
The Influence of C(sp 3 )H–Selenium Interactions on the 77 Se NMR Quantification of the π‐Accepting Properties of Carbenes
Autor: Glen P. Junor, Jan Lorkowski, Cory M. Weinstein, Rodolphe Jazzar, Cezary Pietraszuk, Guy Bertrand
Publikováno v: Angewandte Chemie International Edition
Angewandte Chemie International Edition, Wiley-VCH Verlag, 2020, 59 (49), pp.22028-22033. ⟨10.1002/anie.202010744⟩
Angewandte Chemie, vol 132, iss 49
International audience
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65f300464929fbebd6595a48c3019e82
https://hal.archives-ouvertes.fr/hal-03083241/document
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10
Efficient Homocoupling of Aryl- and Alkenylboronic Acids in the Presence of Low Loadings of [{Pd(μ–OH)Cl(IPr)}2]
Autor: Sylwia Ostrowska, Szymon Rogalski, Jędrzej Walkowiak, Jan Lorkowski, Cezary Pietraszuk
Publikováno v: Synlett. 29:1735-1740
NHC–palladium(II) complex [{Pd(μ–OH)Cl(IPr)}2] (IPr = bis(2,6-di­isopropylphenyl)imidazolin-2-ylidene) catalyzes the oxidative coupling of a broad spectrum of aryl- and alkenylboronic acids at loadings down to 5 ppm. At the concentration of 0.0
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::46b1780babf532460b06255f449a57f4
https://doi.org/10.1055/s-0036-1591602
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