scholarly journals “Goldilocks Effect” of Water in Lewis-Brønsted Acid and Base Catalysis

ACS Catalysis ◽  
2016 ◽  
Vol 6 (7) ◽  
pp. 4189-4194 ◽  
Author(s):  
Benedict J. Barron ◽  
Wing-Tak Wong ◽  
Pauline Chiu ◽  
King Kuok Hii
Keyword(s):  
Base Catalysis ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Effect Of Water ◽  
Brönsted Acid ◽  
Acid And Base ◽  
Acid And Base Catalysis

The Enhancement of Enzymatic Rate Accelerations by Brønsted Acid−Base Catalysis†

Biochemistry ◽  
1998 ◽  
Vol 37 (13) ◽  
pp. 4305-4309 ◽  
Author(s):  
John P. Richard
Keyword(s):  
Base Catalysis ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Acid Base ◽  
Brönsted Acid

Structure−Reactivity Relationships for β-Galactosidase (Escherichia coli,lac Z). 3. Evidence that Glu-461 Participates in Brønsted Acid−Base Catalysis of β-d-Galactopyranosyl Group Transfer†

Biochemistry ◽  
1996 ◽  
Vol 35 (38) ◽  
pp. 12377-12386 ◽  
Author(s):  
John P. Richard ◽  
Reuben E. Huber ◽  
Sue Lin ◽  
Christine Heo ◽  
Tina L. Amyes
Keyword(s):  
Escherichia Coli ◽  
Base Catalysis ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Acid Base ◽  
Group Transfer ◽  
Brönsted Acid ◽  
Lac Z

Merging Chiral Brønsted Acid/Base Catalysis: An Enantioselective [4 + 2] Cycloaddition of o-Hydroxystyrenes with Azlactones

2016 ◽  
Vol 81 (4) ◽  
pp. 1681-1688 ◽  
Author(s):  
Yu-Chen Zhang ◽  
Qiu-Ning Zhu ◽  
Xue Yang ◽  
Lu-Jia Zhou ◽  
Feng Shi
Keyword(s):  
Base Catalysis ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Acid Base ◽  
Brönsted Acid ◽  
Chiral Bronsted Acid

Protic Ionic Liquids and Ionicity

2007 ◽  
Vol 60 (1) ◽  
pp. 21 ◽  
Author(s):  
Bharathi Nuthakki ◽  
Tamar L. Greaves ◽  
Irena Krodkiewska ◽  
Asoka Weerawardena ◽  
M. Iko Burgar ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Protic Ionic Liquids ◽  
Acid Base ◽  
Degree Of Ionization ◽  
Brönsted Acid ◽  
Acid And Base ◽  
Brønsted Base ◽  
Ir And Raman

Protic ionic liquids (PILs) are a subset of ionic liquids formed by the equimolar mixing of a Brønsted acid and a Brønsted base. PILs have been categorized as poor ionic liquids. However, the issue of assessing the ionicity of PILs is still a matter of debate. In this work we studied some physicochemical properties of three chosen PILs, namely, ethanolammonium acetate (EOAA), 2-methylbutylammonium formate (2MBAF), and pentylammonium formate (PeAF), at the initial equimolar (stoichiometric) acid/base ratio and in the presence of excess acid and base. DSC phase-transition studies along with NMR, IR, and Raman spectroscopy were performed on the chosen PILs. The results are discussed in terms of the degree of ionization (extent of proton transfer from the Brønsted acid to Brønsted base), and the possibility of the formation of polar 1:1 complexes and larger aggregates in the neat stoichiometric PILs.

Fluorine effects in organocatalysis – asymmetric Brønsted acid assisted Lewis base catalysis for the synthesis of trifluoromethylated heterocycles exploiting the negative hyperconjugation of the CF3-group

2014 ◽  
Vol 50 (58) ◽  
pp. 7889-7892 ◽  
Author(s):  
Chandra M. R. Volla ◽  
Arindam Das ◽  
Iuliana Atodiresei ◽  
Magnus Rueping
Keyword(s):  
Lewis Base ◽  
Base Catalysis ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Enantiomerically Pure ◽  
Brönsted Acid ◽  
Negative Hyperconjugation

An efficient Brønsted acid assisted Lewis base catalysis protocol for the synthesis of enantiomerically pure trifluoromethylated dihydropyridazines has been developed.

Solvent-Free Acetalization of Glycerol with n-Octanal using Combined Brønsted Acid-Surfactant Catalyst

2017 ◽  
Vol 54 (1) ◽  
pp. 54-63 ◽  
Author(s):  
Xu Li ◽  
Lan Wu ◽  
Qiong Tang ◽  
Jinxiang Dong
Keyword(s):  
Solvent Free ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid

Synthetic Scope of Brønsted Acid-Catalyzed Reactions of Carbonyl Compounds and Ethyl Diazoacetate

2021 ◽  
Author(s):  
Mizzanoor Rahaman ◽  
M. Shahnawaz Ali ◽  
Khorshada Jahan ◽  
Damon Hinz ◽  
Jawad Bin Belayet ◽  
...  
Keyword(s):  
Carbonyl Compounds ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Ethyl Diazoacetate ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
Catalyzed Reactions

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.

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