Brønsted Acid Catalysis: Hydrogen Bonding versus Ion Pairing in Imine Activation

2011 ◽  
Vol 123 (28) ◽  
pp. 6488-6493 ◽  
Author(s):  
Matthias Fleischmann ◽  
Diana Drettwan ◽  
Erli Sugiono ◽  
Magnus Rueping ◽  
Ruth M. Gschwind
Keyword(s):  
Hydrogen Bonding ◽  
Acid Catalysis ◽  
Ion Pairing ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Bronsted Acid Catalysis

Brønsted Acid Catalysis: Hydrogen Bonding versus Ion Pairing in Imine Activation

2011 ◽  
Vol 50 (28) ◽  
pp. 6364-6369 ◽  
Author(s):  
Matthias Fleischmann ◽  
Diana Drettwan ◽  
Erli Sugiono ◽  
Magnus Rueping ◽  
Ruth M. Gschwind
Keyword(s):  
Hydrogen Bonding ◽  
Acid Catalysis ◽  
Ion Pairing ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Bronsted Acid Catalysis

scholarly journals Ternary complexes of chiral disulfonimides in transfer-hydrogenation of imines: the relevance of late intermediates in ion pair catalysis

2021 ◽  
Author(s):  
Matej Žabka ◽  
Ruth M. Gschwind
Keyword(s):  
Acid Catalysis ◽  
Computational Study ◽  
Ion Pairing ◽  
Ion Pair ◽  
Ternary Complexes ◽  
Transfer Hydrogenation ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Bronsted Acid Catalysis

In ion pairing catalysis, the structures of advanced intermediates are often not accessible. Here, we present a combined experimental and computational study of ternary complexes in Brønsted acid catalysis, which show unexpected H-bond switching.

Ion-pairing catalysis in the enantioselective addition of hydrazones to N-acyldihydropyrrole derivatives

2018 ◽  
Vol 54 (64) ◽  
pp. 8905-8908 ◽  
Author(s):  
Nagore Zabaleta ◽  
Uxue Uria ◽  
Efraim Reyes ◽  
Luisa Carrillo ◽  
Jose L. Vicario
Keyword(s):  
Acid Catalysis ◽  
Ion Pairing ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Acyl Anion ◽  
Enantioselective Addition ◽  
Bronsted Acid Catalysis

Quaternary N-acyliminium salts generated from dihydropyrrole derivatives under Brønsted acid catalysis react with hydrazones, the latter participating as masked nucleophilic acyl anion equivalents.

Practical catalytic enantioselective synthesis of 2,3-dihydroquin-azolinones by chiral brønsted acid catalysis

2021 ◽  
Author(s):  
Yongbiao Guo ◽  
Zhenhua Gao ◽  
Junchen Li ◽  
Xiaojing Bi ◽  
Enxue Shi ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Acid Catalysis ◽  
Enantioselective Synthesis ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Chiral Bronsted Acid ◽  
Bronsted Acid Catalysis

An efficient, practical and scalable protocol to prepare chiral 2,3-dihydroquinazolinones was developed under catalysis of spirocyclic SPINOL-phosphoric acid.

Inhibition by Water during Heterogeneous Brønsted Acid Catalysis by Three-Dimensional Crystalline Organic Salts

2021 ◽  
Author(s):  
Alexander Gak ◽  
Svetlana Kuznetsova ◽  
Yulia Nelyubina ◽  
Alexander A. Korlyukov ◽  
Han Li ◽  
...  
Keyword(s):  
Acid Catalysis ◽  
Three Dimensional ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Organic Salts ◽  
Brönsted Acid ◽  
Bronsted Acid Catalysis

Dual Nickel and Brønsted Acid Catalysis for Hydroalkenylation

2018 ◽  
Vol 57 (51) ◽  
pp. 16604-16605 ◽  
Author(s):  
Xiaohua Liu ◽  
Xiaoming Feng
Keyword(s):  
Acid Catalysis ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Bronsted Acid Catalysis

scholarly journals New opportunities in the stereoselective dearomatization of indoles

2016 ◽  
Vol 88 (3) ◽  
pp. 207-214 ◽  
Author(s):  
Elisabetta Manoni ◽  
Assunta De Nisi ◽  
Marco Bandini
Keyword(s):  
Acid Catalysis ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Reaction Conditions ◽  
Brönsted Acid ◽  
High Yields ◽  
First Time ◽  
Tailored Design ◽  
Bronsted Acid Catalysis

AbstractThe regio- and stereoselective dearomatization of indoles is realized for the first time by combining readily available indolyl precursors and electron-rich allenes, namely allenamides and aryloxyallenes. Inter- as well as intramolecular condensations were realized under gold and Brønsted acid catalysis providing a range of densely functionalized indoline and indolenine cores in high yields and excellent stereochemical outcome. Chemodivergent reaction profiles (Micheal-type addition vs. [2+2]-cycloaddition) were realized by a tailored design of both reaction conditions and functionalization of the reaction partners.

Asymmetric Synthesis of 1,2-Diamines bearing Tetrasubstituted Centers from Nonstabilized Azomethine Ylides and N-Sulfinylketimines under Brønsted Acid Catalysis

2015 ◽  
Vol 18 (1) ◽  
pp. 92-95 ◽  
Author(s):  
Cristina Izquierdo ◽  
Francisco Esteban ◽  
José Luis García Ruano ◽  
Alberto Fraile ◽  
José Alemán
Keyword(s):  
Asymmetric Synthesis ◽  
Acid Catalysis ◽  
Azomethine Ylides ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Bronsted Acid Catalysis
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