Journal ArticleDOI
Keto-enol tautomerization rates of acetylacetone in mixed aqueous media
Hitoshi Watarai,Nobuo Suzuki +1 more
TLDR
In this paper, the kinetics of keto-enol tautomerization of acetylacetone were studied in mixed aqueous media by u.v. and NMR spectrometries.About:
This article is published in Journal of Inorganic and Nuclear Chemistry.The article was published on 1974-08-01. It has received 22 citations till now. The article focuses on the topics: Acetylacetone & Solvation.read more
Citations
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Journal ArticleDOI
Solvent effect on keto–enol tautomerism in a new β-diketone: a comparison between experimental data and different theoretical approaches
TL;DR: In this article, a β-diketo compound (3-acetyl-4-oxopentanoic acid) OPAA is synthesized and completely characterized in the solid state by means of X-ray crystallography and in solution by potentiometry and 1H and 13C NMR spectroscopy.
Book ChapterDOI
Tautomerism: Introduction, History, and Recent Developments in Experimental and Theoretical Methods
TL;DR: Prototropic tautomerism, defined by one of its early investigators as the addition of a proton at one molecular site and its removal from another, is one of the most important phenomena in organic chemistry despite the relatively small proportion of molecules in which it can occur as discussed by the authors.
Journal ArticleDOI
Metal binding ability of curcumin derivatives: a theoretical vs. experimental approach.
TL;DR: DPPH assay evidences how antioxidant ability of curcumin derivatives is mainly due to the presence of a phenolic group and metal coordination by a keto-enolic moiety does not affect it, especially for K2A21.
Journal ArticleDOI
Improved synthesis of 14-hydroxy opioid pharmaceuticals and intermediates
Gaik B. Kok,Peter J. Scammells +1 more
TL;DR: Significantly improved reaction conditions for the synthesis of oxycodone via the conventional two-step process involving oxidation of thebaine (3) into 14-hydroxycodeinone (5) and subsequent reduction of 5 via catalytic hydrogenation, are reported in this article.
Journal ArticleDOI
A novel method for quantitative analysis of acetylacetone and ethyl acetoacetate by fluorine‐19 nuclear magnetic spectroscopy
Zhou Lulin,Li Cheng,Xinchu Weng +2 more
TL;DR: A new method utilization of NMR spectra was developed for structural and quantitative analysis of enol forms of acetylacetone and ethyl acetoacetate and the feasibility of 19F NMR method is testified.
References
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Journal ArticleDOI
Fast elementary steps in chemical reaction mechanisms
TL;DR: A review of studies of fast chemical reaction steps which were studied using various relaxation techniques is presented in this paper, which includes ligand substitution in metal complexes, proton transfer, and enzymatic hydrolysis.
Journal ArticleDOI
Nuclear magnetic resonance measurements in solutions of acetylacetone: the effect of solvent interactions on the tautomeric equilibrium
TL;DR: In this paper, a modified assignment of PMR signals in acetylacetone was confirmed, and the changes in intensity of selected signals with temperature were used to calculate an enthalpy of conversion of 2700 ǫ± Ãǫ 100 c.
Related Papers (5)
Keto-enol tautomerization rates of acetylacetone in water-acetonitrile and water-dimethyl sulfoxide mixtures: Rate-partition relationship
Hitoshi Watarai,Nobuo Suzuki +1 more
The Base-catalyzed Tautomerization of Acetylacetone in Organic Solvents. The Correlation of the Catalytic Coefficient with the Partition Coefficient
Hitoshi Watarai,Nobuo Suzuki +1 more