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[Natural derivatives of 4H-pyran-4-one].
Ceska a Slovenska farmacie : casopis Ceske farmaceuticke spolecnosti a Slovenske farmaceuticke spolecnosti, 2006The present review paper describes the natural derivatives of 4H-pyran-4-one (simple, benzo- and dibenzo-derivatives). It includes their origin, use, and particularly in the case of flavonoids their biological actions and therapeutic use.
M, Uher, J, Cizmárik
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Synthesis, molecular docking and biological evaluation of new steroidal 4H-pyrans
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2014A series of new steroidal 4H-pyrans (4-6) have been synthesized from steroidal α, β-unsaturated ketones (1-3). The products (4-6) were characterized by IR, (1)H NMR, (13)C NMR, MS and analytical data. The interaction studies of compounds (4-6) with DNA were carried out by employing gel electrophoresis, UV-vis and fluorescence spectroscopy.
Shams, Uzzaman +5 more
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MO study of molecular and electronic structure of 2H and 4H-pyrans
Collection of Czechoslovak Chemical Communications, 1981CNDO/2, STO-3G and 4-31G MO calculations have been carried for the molecules I-IV. Their molecular and electronic structure is discussed with respect to relative stabilities of the respective compounds and valence isomerism I III. Significance of application of the split-valence base in the ab initio MO calculations carried out is demonstrated.
Josef Kuthan, Stanislav Böhm
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An Efficient One‐Pot Synthesis of 2‐Amino‐4H‐pyrans.
ChemInform, 2006AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
A. Zonouzi, D. Kazemi, M. Nezamabadi
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Synthesis and reaction of 3-hydroxytetrahydro-4H-pyran-4-one
J. Chem. Soc., Perkin Trans. 1, 1979Photosensitized oxygenation of 5,6-dihydro-4-methyl-2H-pyran (1) in methanol followed by reduction gave two kinds of allyl alcohols [(2) and (3)] together with the epoxy-ethers (4) and (5). When the reaction was carried out in solvents other than alcohols it gave (2) and (3) exclusively.
Kikumasa Sato +3 more
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A Review on the Recent Multicomponent Synthesis of 4H-Pyran Derivatives
Mini-Reviews in Organic ChemistryAbstract: 4H-Pyran is a well-known moiety, which appears in various natural and synthetic products. These compounds include various biological activities like anti-hepatotoxic, antitumor, anti-inflammatory, antioxidant, anti-spasmolytic, diuretic, estrogenic, anticoagulant, antifungal, antiviral, anti-helminthic, antimicrobial, hypothermal, anti ...
Ghada G. El-Bana +4 more
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Recyclization of 4H-pyrans to 4H-selenopyrans
Chemistry of Heterocyclic Compounds, 1998B. I. Drevko +2 more
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The reaction of phosgene with 2,6-dimethyl-4H-pyran-4-one
Tetrahedron, 1972Abstract Phosgene reacts with 2,6-dimethyl-4H-pyran-4-one at room temperature to yield 2,6-bis(4′-chloro-2′,6′-dimethylphenyl)-4H-pyran-4-one (I), and 2-(4′-chloro-2′,6′-dimethylphenyl)-6-methyl-4H-pyran-4-one (II). The structure assignment and the mechanism of formation is discussed. Some 4H-ylidene derivatives of I and II were prepared.
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Synthetic Approaches to the 4H-Pyran Ring
HETEROCYCLES, 1980José L. Soto +3 more
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