scholarly journals A mechanistic study of the Lewis acid–Brønsted base–Brønsted acid catalysed asymmetric Michael addition of diethyl malonate to cyclohexenone

2017 ◽  
Vol 7 (1) ◽  
pp. 90-101 ◽  
Author(s):  
Yuri Samoilichenko ◽  
Veronica Kondratenko ◽  
Mariam Ezernitskaya ◽  
Konstantin Lyssenko ◽  
Alexander Peregudov ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Michael Addition ◽  
Diethyl Malonate ◽  
Mechanistic Study ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Asymmetric Michael Addition ◽  
Brönsted Acid ◽  
Brønsted Base

Reaction shown to exhibit biomimetic behaviour.

Complex containing a Lewis acid and Brønsted acid for the catalytic reactions of aza-Michael addition

2011 ◽  
Vol 52 (4) ◽  
pp. 525-528 ◽  
Author(s):  
Xin-xin Mao ◽  
Jiao Wang ◽  
Qun-hua Xia ◽  
Yong-miao Shen
Keyword(s):  
Lewis Acid ◽  
Michael Addition ◽  
Catalytic Reactions ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid

Chiral ionic Brønsted acid–achiral Brønsted base synergistic catalysis for asymmetric sulfa-Michael addition to nitroolefins

2012 ◽  
Vol 3 (11) ◽  
pp. 3161 ◽  
Author(s):  
Daisuke Uraguchi ◽  
Natsuko Kinoshita ◽  
Daisuke Nakashima ◽  
Takashi Ooi
Keyword(s):  
Michael Addition ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Synergistic Catalysis ◽  
Brönsted Acid ◽  
Brønsted Base

scholarly journals Tailoring Lewis/Brønsted acid properties of MOF nodes via hydrothermal and solvothermal synthesis: simple approach with exceptional catalytic implications

2021 ◽  
Author(s):  
Sergio Rojas-Buzo ◽  
Benjamin Bohigues ◽  
Christian W. Lopes ◽  
Débora M. Meira ◽  
Mercedes Boronat ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Active Site ◽  
Solvothermal Synthesis ◽  
Simple Approach ◽  
Organic Reactions ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Acid Properties ◽  
Brönsted Acid

The Brønsted/Lewis acid properties of Hf-MOF-808 can be tuned by simply controlling the solvent employed in its synthesis, with direct catalytic implications on the activity and selectivity of organic reactions sensitive to the active site nature.

Study on the removal and depolymerization of lignin from corn stover through the synergistic effect of Brønsted acid, Lewis acid and hydrogenation sites

Fuel ◽  
2021 ◽  
Vol 305 ◽  
pp. 121509
Author(s):  
Baikai Zhang ◽  
Wenzhi Li ◽  
Tingwei Zhang ◽  
Xu Li ◽  
Ajibola T. Ogunbiyi ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Corn Stover ◽  
Lewis Acid ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid

Critical role of Bronsted acid in Lewis-acid-catalyzed synthesis of Amadori and Heyns compounds of β-amino acids

2021 ◽  
pp. 1-11
Author(s):  
Debasree Chanda ◽  
Gangothri M. Venkataswamy ◽  
Lagamawwa V. Hipparagi ◽  
Nanishankar V. Harohally
Keyword(s):  
Amino Acids ◽  
Lewis Acid ◽  
Critical Role ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Acid Catalyzed

scholarly journals Tartaric Acid–Zinc Nitrate as an Efficient Brønsted Acid-Assisted Lewis Acid Catalyst for the Mannich Reaction

2018 ◽  
Vol 42 (9) ◽  
pp. 463-466 ◽  
Author(s):  
Hao Dong ◽  
Qing Liu ◽  
Yuanyu Tian ◽  
Yingyun Qiao
Keyword(s):  
Tartaric Acid ◽  
Lewis Acid ◽  
Mannich Reaction ◽  
Reaction Times ◽  
Acid Catalyst ◽  
Zinc Nitrate ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
One Pot ◽  
Brönsted Acid

Tartaric acid–zinc nitrate has been found to be an efficient Brønsted acid-assisted Lewis acid catalytic system for the facile synthesis of β-amino carbonyl compounds through the one-pot Mannich reaction of aldehydes, aromatic amines and ketones in ethanol at room temperature. Remarkable enhancement of reactivity by tartaric acid (Brønsted acid) was observed in these reactions in the presence of anhydrous zinc nitrate (Lewis acid), due to coordination of the tartaric acid ligand to zinc ions increasing the acidity of the system. This procedure shows some advantages such as mild reaction conditions, short reaction times and high yields.

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