The kinetics of Brønsted acid-catalyzed hydrolysis of hemicellulose dissolved in 1-ethyl-3-methylimidazolium chloride

RSC Advances ◽  
2012 ◽  
Vol 2 (26) ◽  
pp. 10028 ◽  
Author(s):  
Kristopher R. Enslow ◽  
Alexis T. Bell
Keyword(s):  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
Kinetics Of ◽  
Hydrolysis Of

On the Brønsted Acid-Catalyzed Homogeneous Hydrolysis of Furans

ChemSusChem ◽  
2013 ◽  
Vol 6 (11) ◽  
pp. 2066-2068 ◽  
Author(s):  
Nima Nikbin ◽  
Stavros Caratzoulas ◽  
Dionisios G. Vlachos
Keyword(s):  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
Hydrolysis Of ◽  
Homogeneous Hydrolysis

Amide directed hydrocarboxylation of N-allylacetamide catalyzed by the aqueous Pd - tppts - Brønsted acid system (tppts = P(C6H4-m-SO3Na)3)1

2001 ◽  
Vol 79 (5-6) ◽  
pp. 688-692 ◽  
Author(s):  
Göran Verspui ◽  
Gábor Besenyei ◽  
Roger A Sheldon
Keyword(s):  
Substitution Reaction ◽  
Aqueous Media ◽  
Propanoic Acid ◽  
Allylic Substitution ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Mild Conditions ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
Hydrolysis Of

The Pd - tppts - HOTs (tppts = P(C6H4-m-SO3Na)3, HOTs = p-toluenesulfonic acid) catalyzed hydrocarboxylation of N-allylacetamide in an aqueous medium afforded 4-acetamidobutyric acid and 3-acetamido-2-methylpropanoic acid under mild conditions, with a high regioselectivity towards the linear isomer. During the hydrocarboxylation an acid catalyzed hydrolysis of the amide moieties of both the substrate and the products took place, as well as the formation of acetamide and propanal, presumably via a Pd-catalyzed allylic substitution reaction of N-allylacetamide. The hydrolysis reaction was suppressed by lowering the amount of Brønsted acid cocatalyst (HOTs) or by employing a weaker Brønsted acid such as propanoic acid. The allylic substitution reaction was minimized by increasing the CO pressure but unfortunately this caused a decrease in the regioselectivity. A sudden inhibition took place after ca. 70% conversion, presumably caused by one of the side products. By increasing the tppts concentration to 13.1 mmol L-1 (20 equiv per Pd) the inhibition was circumvented and a quantitative conversion of N-allylacetamide was achieved.Key words: aqueous media, olefins, palladium, hydrocarboxylation, N-allylacetamide.

Kinetics of Homogeneous Brønsted Acid Catalyzed Fructose Dehydration and 5-Hydroxymethyl Furfural Rehydration: A Combined Experimental and Computational Study

ACS Catalysis ◽  
2013 ◽  
Vol 4 (1) ◽  
pp. 259-267 ◽  
Author(s):  
T. Dallas Swift ◽  
Christina Bagia ◽  
Vinit Choudhary ◽  
George Peklaris ◽  
Vladimiros Nikolakis ◽  
...  
Keyword(s):  
Computational Study ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Hydroxymethyl Furfural ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
Fructose Dehydration ◽  
Kinetics Of

Correction to Kinetics of Homogeneous Brønsted Acid Catalyzed Fructose Dehydration and 5-Hydroxymethyl Furfural Rehydration: A Combined Experimental and Computational Study

ACS Catalysis ◽  
2014 ◽  
Vol 4 (5) ◽  
pp. 1320-1320 ◽  
Author(s):  
T. Dallas Swift ◽  
Christina Bagia ◽  
Vinit Choudhary ◽  
George Peklaris ◽  
Vladimiros Nikolakis ◽  
...  
Keyword(s):  
Computational Study ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Hydroxymethyl Furfural ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
Fructose Dehydration ◽  
Kinetics Of

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

Brønsted Acid-Catalyzed Friedel-Crafts-type Alkylation of Arenes with αAryl Diazoacetates

2021 ◽  
pp. 152751
Author(s):  
Wenming Chen ◽  
Guifang Chen ◽  
Biao Wang ◽  
Wei Wang ◽  
Wei Huang ◽  
...  
Keyword(s):  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Acid Catalyzed

Brønsted Acid Catalyzed (4 + 2) Cyclocondensation of 3-Substituted Indoles with Donor–Acceptor Cyclopropanes

2021 ◽  
Author(s):  
Alesandere Ortega ◽  
Uxue Uria ◽  
Tomás Tejero ◽  
Liher Prieto ◽  
Efraim Reyes ◽  
...  
Keyword(s):  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Donor Acceptor ◽  
Acid Catalyzed
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