THE APPLICATION OF GAS—LIQUID PARTITION CHROMATOGRAPHY TO PROBLEMS IN CHEMICAL KINETICS ACID—CATALYZED METHANOLYSIS OF ENOL ACETATES

1960 ◽  
Vol 64 (7) ◽  
pp. 947-949 ◽  
Author(s):  
E. V. Kring ◽  
G. I. Jenkins ◽  
V. L. Bacchetta
Keyword(s):  
Chemical Kinetics ◽  
Partition Chromatography ◽  
Enol Acetates ◽  
Acid Catalyzed

The photoaddition of 1,3-diketonatoboron difluorides with benzene derivatives

1991 ◽  
Vol 69 (3) ◽  
pp. 423-431 ◽  
Author(s):  
Yuan L. Chow ◽  
Xinxin Ouyang
Keyword(s):  
Crystallographic Analysis ◽  
Secondary Oxidation ◽  
Enol Ethers ◽  
X Ray ◽  
Thermal Reactions ◽  
Secondary Reactions ◽  
Enol Acetates ◽  
Orthogonal Orientation ◽  
Acid Catalyzed ◽  
Boron Difluoride

The boron difluoride complexes of 2-acetylcyclohexanone, 2-acetylcyclopentanone, and acetylacetone (abbreviated as ACHBF2, ACPBF2, and AABF2) were irradiated in the presence of benzene to give the 1:1 adducts as the primary photoadducts; for certain BF2 complexes, toluene, chlorobenzene, benzonitrile, and methyl benzoate were also used as substrates. The 1,5-diketone photoadducts were assumed to form by a [2+2] photocycloaddition followed by cyclobutane opening and hydrolysis to give 1,2 adducts. They undergo a variety of secondary thermal reactions, probably acid catalyzed, to give enol ethers, enol acetates, acetophenones, and ketonylacetophenones. The efficiency of these secondary reactions determines the final products. Photoaddition with a monosubstituted benzene preferentially occurs at the 3,4 bond without regioselectivity. Under oxygen, ACHBF2 photolytically reacts with benzene to give a secondary oxidation product of a 10-membered cyclic alkylphe-none, which is proven by X-ray crystallographic analysis to have the benzene ring and carbonyl group in orthogonal orientation. It is shown that the singlet excited state ACHBF2 initiates the photoaddition, probably through the formation of the benzene exciplex, which could be detected by its emission. While the Stern–Volmer rates are small, the quantum yield of photoaddition products is as high as 0.12–0.19 under limiting conditions. Key words: [2+2] photocycloaddition, non-planar alkanophenone, macrocyclic alkanophenone, boron difluoride complexes, photoaddition to benzenes.

scholarly journals Salicylic Acid‐Catalyzed Arylation of Enol Acetates with Anilines

2018 ◽  
Vol 360 (14) ◽  
pp. 2773-2778 ◽  
Author(s):  
Diego Felipe‐Blanco ◽  
Jose C. Gonzalez‐Gomez
Keyword(s):  
Salicylic Acid ◽  
Enol Acetates ◽  
Acid Catalyzed

Ammonolysis as an important loss process of acetaldehyde in the troposphere: energetics and kinetics of water and formic acid catalyzed reactions

2019 ◽  
Vol 21 (29) ◽  
pp. 16170-16179 ◽  
Author(s):  
Saptarshi Sarkar ◽  
Binod Kumar Oram ◽  
Biman Bandyopadhyay
Keyword(s):  
Electronic Structure ◽  
Formic Acid ◽  
Chemical Kinetics ◽  
Loss Process ◽  
Potential Source ◽  
Acid Catalyzed ◽  
Catalyzed Reactions ◽  
Kinetics Of

The reaction of ammonia with acetaldehyde as a potential source of 1,1-aminoethanol in the troposphere has been investigated by electronic structure and chemical kinetics calculations.

Two mechanisms for the acid-catalyzed hydrolysis of enol acetates

1969 ◽  
Vol 91 (1) ◽  
pp. 119-124 ◽  
Author(s):  
Donald S. Noyce ◽  
Ralph M. Pollack
Keyword(s):  
Enol Acetates ◽  
Acid Catalyzed ◽  
Hydrolysis Of

THE APPLICATION OF GAS–LIQUID PARTITION CHROMATOGRAPHY TO PROBLEMS IN CHEMICAL KINETICS

1955 ◽  
Vol 33 (7) ◽  
pp. 1256-1267 ◽  
Author(s):  
A. B. Callear ◽  
R. J. Cvetanović
Keyword(s):  
Chemical Kinetics ◽  
Chromatographic Method ◽  
Partition Chromatography ◽  
Order Of Magnitude

A gas–liquid partition chromatographic method for analysis of samples of the order of magnitude of a micromole is described. Examples of application are given.

Acid Catalyzed Furan Ring Transposition

10.1039/sp768 ◽  
2014 ◽  
Author(s):  
Jamsheena V. ◽  
Ravindra Phatake
Keyword(s):  
Furan Ring ◽  
Acid Catalyzed
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