Diethyl oxaloacetate. Nonconcerted general catalysis of enolization, tertiary amine catalyzed enolization via an addition-elimination mechanism, and general-acid-catalyzed dehydration and cleavage

1978 ◽  
Vol 100 (15) ◽  
pp. 4802-4808 ◽  
Author(s):  
Paula Yurkanis Bruice ◽  
Thomas C. Bruice
Keyword(s):  
Tertiary Amine ◽  
General Acid ◽  
Elimination Mechanism ◽  
Acid Catalyzed

The nature of the steric effect in the general-acid-catalyzed hydrolyses of benzaldehyde acetals

1983 ◽  
Vol 48 (23) ◽  
pp. 4175-4179 ◽  
Author(s):  
James L. Jensen ◽  
Anna B. Martinez ◽  
Cheryl L. Shimazu
Keyword(s):  
Steric Effect ◽  
General Acid ◽  
Acid Catalyzed

Deuterium exchange of C-methyl protons in lumazine derivatives

1970 ◽  
Vol 48 (2) ◽  
pp. 263-270 ◽  
Author(s):  
J. M. McAndless ◽  
Ross Stewart
Keyword(s):  
Proton Magnetic Resonance ◽  
Proton Magnetic Resonance Spectroscopy ◽  
Acid Catalysis ◽  
Deuterium Exchange ◽  
Base Catalysis ◽  
Resonance Spectroscopy ◽  
Methyl Group ◽  
General Base ◽  
General Acid ◽  
Acid Catalyzed

Proton magnetic resonance spectroscopy has been used to examine the deuterium exchange of the methyl protons in two lumazine derivatives. The exchange occurs at the C-7 methyl group in 6,7,8-trimethyllumazine (2) and at the C-6 methyl group in 1,7-dihydro-6,7,8-trimethyllumazine (3). The former reaction is subject to both general acid- and general base-catalysis but the latter only to general acid-catalysis. Plausible mechanisms for the reactions of both compounds are advanced, involving in the case of 3, acid-catalyzed addition of water across the C6—N5 double bond.

scholarly journals REDUCTION OF CARBONYL SUBSTRATES BY 3-CARBOXY-N-BENZYL-1,4-DIHYDROQUINOLINE: BIFUNCTIONALITY IN THE GENERAL-ACID CATALYZED NADH MODEL REDUCTION

1979 ◽  
Vol 8 (3) ◽  
pp. 229-232 ◽  
Author(s):  
Seiji Shinkai ◽  
Tetsuya Nakano ◽  
Hisatake Hamada ◽  
Yumiko Kusano ◽  
Osamu Manabe
Keyword(s):  
Model Reduction ◽  
General Acid ◽  
Acid Catalyzed

The general acid catalyzed displacement of amines from o-hydroxylaminobenzamides in aqueous and nonaqueous solvents

1976 ◽  
Vol 98 (1) ◽  
pp. 159-162 ◽  
Author(s):  
Brian G. Cox ◽  
Alexander E. A. Porter
Keyword(s):  
Nonaqueous Solvents ◽  
General Acid ◽  
Acid Catalyzed

Ortho Esters, Imidic Esters and Amidines. V. General Acid Catalyzed Hydrolysis of Ethyl Orthoformate1

1954 ◽  
Vol 76 (17) ◽  
pp. 4379-4381 ◽  
Author(s):  
Robert H. DeWolfe ◽  
Royston M. Roberts
Keyword(s):  
General Acid ◽  
Acid Catalyzed ◽  
Ortho Esters ◽  
Hydrolysis Of

Hydrolyses of 2- and 4-fluoro N-heterocycles. 3. Nucleophilic catalysis by buffer bases in the general-acid-catalyzed hydrolysis of 4-fluoroquinaldine

1989 ◽  
Vol 54 (1) ◽  
pp. 166-171 ◽  
Author(s):  
Oliver J. Muscio ◽  
Paula G. Theobald ◽  
Denise R. Rutherford
Keyword(s):  
Nucleophilic Catalysis ◽  
General Acid ◽  
Acid Catalyzed ◽  
Hydrolysis Of
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