scholarly journals Asymmetric Nazarov Cyclizations of Unactivated Dienones by Hydrogen‐Bond‐Donor/Lewis Acid Co–Catalyzed, Enantioselective Proton‐Transfer

2020 ◽  
Vol 362 (19) ◽  
pp. 4092-4097 ◽  
Author(s):  
Jan B. Metternich ◽  
Martin Reiterer ◽  
Eric N. Jacobsen
Keyword(s):  
Hydrogen Bond ◽  
Proton Transfer ◽  
Lewis Acid ◽  
Hydrogen Bond Donor ◽  
Nazarov Cyclizations

Internal Lewis acid assisted ureas: tunable hydrogen bond donor catalysts

2013 ◽  
Vol 49 (39) ◽  
pp. 4289-4291 ◽  
Author(s):  
David M. Nickerson ◽  
Veronica V. Angeles ◽  
Tyler J. Auvil ◽  
Sonia S. So ◽  
Anita E. Mattson
Keyword(s):  
Hydrogen Bond ◽  
Lewis Acid ◽  
Hydrogen Bond Donor

Aminoethylimidazole ionic liquid grafted MIL-101-NH2 heterogeneous catalyst for conversion of CO2 and epoxide without solvent and cocatalyst

2021 ◽  
Author(s):  
Chenglong Bao ◽  
Yichen Jiang ◽  
Liyan Zhao ◽  
Dazhi Li ◽  
Ping Xu ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Ionic Liquid ◽  
Lewis Acid ◽  
Ring Opening ◽  
Synergistic Effects ◽  
Acid Sites ◽  
Epoxide Ring ◽  
Hydrogen Bond Donor ◽  
Lewis Acid Sites ◽  
Epoxide Ring Opening

Besides the activation of CO2 by Lewis basic groups, the synergistic effects of Lewis acid sites (or hydrogen bond donor) together with halogen nucleophilic anions to activate epoxide ring opening...

Lewis Acid Activation of a Hydrogen Bond Donor Metal–Organic Framework for Catalysis

ACS Catalysis ◽  
2016 ◽  
Vol 6 (5) ◽  
pp. 3248-3252 ◽  
Author(s):  
Edward A. Hall ◽  
Louis R. Redfern ◽  
Michael H. Wang ◽  
Karl A. Scheidt
Keyword(s):  
Hydrogen Bond ◽  
Lewis Acid ◽  
Metal Organic Framework ◽  
Acid Activation ◽  
Hydrogen Bond Donor ◽  
Metal Organic ◽  
Organic Framework

Hybrid Lewis Acid/Hydrogen-Bond Donor Receptor for Fluoride

2006 ◽  
Vol 8 (13) ◽  
pp. 2747-2749 ◽  
Author(s):  
Todd W. Hudnall ◽  
Mohand Melaïmi ◽  
François P. Gabbaï
Keyword(s):  
Hydrogen Bond ◽  
Lewis Acid ◽  
Hydrogen Bond Donor

scholarly journals Hydrogen-Bonded Cyclic Dimers at Large Compression: The Case of 1H-pyrrolo[3,2-h]quinoline and 2-(2′-pyridyl)pyrrole

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 3802
Author(s):  
Dominik Kurzydłowski ◽  
Taisiia Chumak ◽  
Jakub Rogoża ◽  
Arkadiusz Listkowski
Keyword(s):  
Hydrogen Bond ◽  
Proton Transfer ◽  
Intermolecular Hydrogen Bond ◽  
Molecular Crystals ◽  
Transfer Reactions ◽  
Hydrogen Bond Donor ◽  
Double Proton Transfer ◽  
Proton Transfer Reactions ◽  
Dft Modelling ◽  
Intramolecular Transfer

1H-pyrrolo[3,2-h]qinoline (PQ) and 2-(2′-pyridyl)pyrrole (PP) are important systems in the study of proton-transfer reactions. These molecules possess hydrogen bond donor (pyrrole) and acceptor (pyridine) groups, which leads to the formation of cyclic dimers in their crystals. Herein, we present a joint experimental (Raman scattering) and computational (DFT modelling) study on the high-pressure behaviour of PQ and PP molecular crystals. Our results indicate that compression up to 10 GPa (100 kbar) leads to considerable strengthening of the intermolecular hydrogen bond within the cyclic dimers. However, the intramolecular N–H∙∙∙N interaction is either weakly affected by pressure, as witnessed in PQ, or weakened due to compression-induced distortions of the molecule, as was found for PP. Therefore, we propose that the compression of these systems should facilitate double proton transfer within the cyclic dimers of PQ and PP, while intramolecular transfer should either remain unaffected (for PQ) or weakened (for PP).

B-Doped and NH2-functionalized SBA-15 with hydrogen bond donor groups for effective catalysis of CO2 cycloaddition to epoxides

2020 ◽  
Vol 7 (19) ◽  
pp. 3636-3645 ◽  
Author(s):  
Yifei Ye ◽  
Dazhi Li ◽  
Ping Xu ◽  
Jianmin Sun
Keyword(s):  
Hydrogen Bond ◽  
Lewis Acid ◽  
Catalytic Performance ◽  
Solvent Free ◽  
The Novel ◽  
Hydrogen Bond Donor ◽  
Acid Base ◽  
Solvent Free Conditions ◽  
Base Properties

The novel B-SBA-15-NH2 catalyst with Lewis acid–base properties and hydrogen bond donor groups exhibited good catalytic performance for CO2 conversion under metal- and solvent-free conditions.

ChemInform Abstract: Internal Lewis Acid Assisted Hydrogen Bond Donor Catalysis.

ChemInform ◽  
2011 ◽  
Vol 42 (22) ◽  
pp. no-no
Author(s):  
Sonia S. So ◽  
Julie A. Burkett ◽  
Anita E. Mattson
Keyword(s):  
Hydrogen Bond ◽  
Lewis Acid ◽  
Hydrogen Bond Donor

Internal Lewis Acid Assisted Hydrogen Bond Donor Catalysis

2011 ◽  
Vol 13 (4) ◽  
pp. 716-719 ◽  
Author(s):  
Sonia S. So ◽  
Julie A. Burkett ◽  
Anita E. Mattson
Keyword(s):  
Hydrogen Bond ◽  
Lewis Acid ◽  
Hydrogen Bond Donor

ChemInform Abstract: Internal Lewis Acid Assisted Ureas: Tunable Hydrogen Bond Donor Catalysts.

ChemInform ◽  
2013 ◽  
Vol 44 (36) ◽  
pp. no-no
Author(s):  
David M. Nickerson ◽  
Veronica V. Angeles ◽  
Tyler J. Auvil ◽  
Sonia S. So ◽  
Anita E. Mattson
Keyword(s):  
Hydrogen Bond ◽  
Lewis Acid ◽  
Hydrogen Bond Donor
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