Melamine formaldehyde compounds. The active species in acid catalyzed reactions

Polymer ◽  
2006 ◽  
Vol 47 (9) ◽  
pp. 3249-3256 ◽  
Author(s):  
Arvid Berge ◽  
Thor Mejdell
Keyword(s):  
Active Species ◽  
Melamine Formaldehyde ◽  
Acid Catalyzed ◽  
Catalyzed Reactions

Isolation, Characterization, and Identification of Catalytically Active Species in the MoO3/SiO2Catalyst during Solid Acid Catalyzed Reactions

ChemCatChem ◽  
2013 ◽  
Vol 5 (6) ◽  
pp. 1531-1537 ◽  
Author(s):  
Trupti V. Kotbagi ◽  
Ankush V. Biradar ◽  
Shubhangi B. Umbarkar ◽  
Mohan K. Dongare
Keyword(s):  
Solid Acid ◽  
Active Species ◽  
Catalytically Active ◽  
Acid Catalyzed ◽  
Catalyzed Reactions

Photoinduced rearrangement of hydroxymethylisoxazolines, a route to enaminoaldehydes

1986 ◽  
Vol 51 (10) ◽  
pp. 2167-2180 ◽  
Author(s):  
Lubor Fišera ◽  
Nadezhda D. Kozhina ◽  
Peter Oravec ◽  
Hans-Joachim Timpe ◽  
Ladislav Štibrányi ◽  
...  
Keyword(s):  
Thionyl Chloride ◽  
Quantum Yields ◽  
Acid Catalyzed ◽  
Catalyzed Reactions ◽  
Photoinduced Rearrangement ◽  
Condensed Heterocycles

3-Aryl-4-R-carbamoyl-5-hydroxymethylisoxazolines (IV) were synthesized by allowing R-NH2 amines with R = H, CH3, C3H7, C6H5C2H5, and NH2 to act on 3-(X-phenyl)-4-oxo-3a,4,6,6a-tetrahydrofuro[3,4-d]isoxazoles (III) with X = H, 4-CH3, 4-OCH3, 2-OCH3, 4-Cl, 2-Cl, 4-F, 2-F, 4-Br, 4-NO2, and 3-NO2. Exposed to radiation, the substances IV give Z-2-hydroxymethylamino-2-aryl-1-formylacrylamides (V) in good yields. The 4-Cl and 4-F substituted Z-derivatives V isomerize irreversibly to the E-derivatives VI if allowed to stand in solvent; the remaining derivatives V are stable. The quantum yields of the photoreaction are from 0.012 to 0.106 in dependence on the substituent X. In all cases where the compounds IV were used for the preparation of condensed heterocycles in conditions of acid-catalyzed reactions, lactones III were preferentially formed; the action of thionyl chloride on IV results in the formation of chloromethyl derivatives VIII, which do not undergo further cyclization.

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

Kinetic modelling of reactions for the synthesis of 2-methyl-5-ethyl pyridine

2021 ◽  
Author(s):  
Emanuele Moioli ◽  
Leo Schmid ◽  
Peter Wasserscheid ◽  
Hannsjoerg Freund
Keyword(s):  
Kinetic Modelling ◽  
Acid Catalyst ◽  
Acid Catalyzed ◽  
Catalyzed Reactions ◽  
Kinetics Of

The kinetics of the acid catalyzed reactions of acetaldehyde ammonia trimer (AAT) and paraldehyde (para) to 2-methyl-5-ethyl pyridine (MEP) in the presence of an acid catalyst were investigated systematically. A...

ChemInform Abstract: Intramolecular Acid-Catalyzed Reactions of o-Carbomethoxy-ω-diazoacetophenones.

ChemInform ◽  
1987 ◽  
Vol 18 (47) ◽  
Author(s):  
S. V. CHAPYSHEV ◽  
L. I. KIRKOVSKII ◽  
V. G. KARTSEV
Keyword(s):  
Acid Catalyzed ◽  
Catalyzed Reactions
Sign in / Sign up

Export Citation Format

Share Document