scholarly journals Computational Study on the Synergic Effect of Brønsted Acid and Hydrogen-Bonding Catalysis for the Dearomatization Reaction of Phenols with Diazo Functionality

2020 ◽  
Vol 68 (11) ◽  
pp. 1104-1108
Author(s):  
Mai Yanagawa ◽  
Mayu Kobayashi ◽  
Mitsuru Ikeda ◽  
Shingo Harada ◽  
Tetsuhiro Nemoto
Keyword(s):  
Hydrogen Bonding ◽  
Computational Study ◽  
Synergic Effect ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid

Effect of organic solvent and Brønsted acid on 5-hydroxymethylfurfural preparation from glucose over CrCl3

RSC Advances ◽  
2015 ◽  
Vol 5 (35) ◽  
pp. 27805-27813 ◽  
Author(s):  
Yan Yang ◽  
Wentao Liu ◽  
Ningning Wang ◽  
Haijun Wang ◽  
Zhanxin Song ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Computational Study ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Effect Of Solvent ◽  
Brönsted Acid

An investigation of the effect of solvent and Brønsted acid on the mechanism of 5-hydroxymethylfurfural preparation from glucose over CrCl3by experimental and computational study.

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.

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

Brønsted Acid Catalyzed Domino 1,6-Addition/Intramolecular Cyclization­ Reactions: Diastereoselective Synthesis of Dihydro­coumarin Frameworks

Synthesis ◽  
2017 ◽  
Vol 50 (06) ◽  
pp. 1307-1314 ◽  
Author(s):  
Guang-Jian Mei ◽  
Zheng Cao ◽  
Gui-Xiang Zhou ◽  
Chun Ma ◽  
Kang Jiang
Keyword(s):  
Hydrogen Bonding ◽  
Crucial Role ◽  
Acid Catalysis ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Diastereoselective Synthesis ◽  
Quinone Methides ◽  
Hydrogen Bonding Interactions ◽  
Brönsted Acid ◽  
Acid Catalyzed

An efficient domino 1,6-addition/intramolecular cyclization reaction between para-quinone methides (p-QMs) and azlactones under Brønsted acid catalysis was established. A series of highly functionalized dihydrocoumarins were constructed in good to excellent yields (up to 96%) with excellent diastereoselectivities (all >20:1 d.r.). In this process, the Brønsted acid plays a crucial role not only in activating the two substrates, but also in controlling the diastereoselectivity of the reaction via hydrogen-bonding interactions. In addition, this protocol demonstrates the great practicability of utilizing p-QMs in domino reactions.

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