Results 11 to 20 of about 6,485 (138)

Profiling the Major Aroma-Active Compounds of Microwave-Dried Jujube Slices through Molecular Sensory Science Approaches

open access: yesFoods, 2023
To discriminate the aroma-active compounds in dried jujube slices through microwave-dried treatments and understand their sensory attributes, odor activity value (OAV) and detection frequency analysis (DFA) combined with sensory analysis and analyzed ...
Xinhuan Yan   +7 more
doaj   +1 more source

Antibacterial Polyketides from the Marine Alga-Derived Endophitic Streptomyces sundarbansensis: A Study on Hydroxypyrone Tautomerism

open access: yesMarine Drugs, 2013
Polyketide 13 [=2-hydroxy-5-((6-hydroxy-4-oxo-4H-pyran-2-yl)methyl)-2- propylchroman-4-one] and three related known compounds 7, 9 and 11 were obtained and structurally characterized from Streptomyces sundarbansensis strain, an endophytic actinomycete ...
Ines Mancini   +3 more
doaj   +1 more source

5-Hydroxy-2-methyl-4H-pyran-4-one

open access: yesActa Crystallographica Section E, 2009
The title compound, C6H6O3, is a member of the pyrone family. The molecules are planar (r.m.s. deviation of the asymmetric unit is 0.0248 Å, whereas that of the dimer is 0.0360 Å) and they are dimerized due to intermolecular O—
Bernhard K. Keppler   +4 more
doaj   +1 more source

Renewable synthesis of branched diols as polymer precursors from biomass-derived lactones and 2-pyrones

open access: yesMaterials Science for Energy Technologies, 2022
Hydric alcohols are important synthetic intermediates used to manufacture polymer, fine chemicals, and commodity products. Recent environmental problems due to fossil fuel-based non-degradable products have call for the advancement in research towards ...
Md. Imteyaz Alam   +3 more
doaj   +1 more source

Synthesis of an Antileukemic Pyrone from

open access: yesNatural Product Communications, 2017
Antileukemic pyrone 1 was synthesized by way of a five-step procedure from 4 -Hydroxy-5-methoxycarbonyl-6-methyl-2-pyrone (8). This is the first synthesis of 4-methoxy-6-methyl-5-(3-oxobutyl)-2H-pyran-2-one (1).
Yang Qu, George A. Kraus
doaj   +1 more source

Synthesis and Antifungal Evaluation of a Ynone-Tethered 2-Pyrone Derivative against Phytopathogenic Fungi [PDF]

open access: yesThe Plant Pathology Journal
Numerous fungicides are essential for controlling phytopathogens, enabling modern industrial agriculture to maximize productivity and profitability. However, the extensive use of widely employed fungicides, such as tebuconazole and carbendazim, has led ...
Heeeun Kim   +8 more
doaj   +1 more source

Transition-metal-free [3+3] annulation reaction of sulfoxonium ylides with cyclopropenones for the synthesis of 2-pyrones

open access: yesGreen Synthesis and Catalysis, 2020
An efficient and practical synthetic approach was developed for the tandem synthesis of trisubstituted 2-pyrone derivatives from sulfoxonium ylides and cyclopropenones. This [3+3] annulation reaction was carried out under transition-metal-free conditions.
Maoyao He   +7 more
doaj   +1 more source

Nocapyrones: α- and γ-Pyrones from a Marine-Derived Nocardiopsis sp.

open access: yesMarine Drugs, 2014
One new α-pyrone (nocapyrone R (1)), and three known γ-pyrones (nocapyrones B, H and L (2–4)) were isolated from the culture extract of a Nocardiopsis strain collected from marine sediment.
Youngju Kim   +7 more
doaj   +1 more source

Reversible Humidity-Driven Transformation of a Bimetallic {EuCo} Molecular Material: Structural, Sorption, and Photoluminescence Studies

open access: yesMolecules, 2021
Functional molecule-based solids built of metal complexes can reveal a great impact of external stimuli upon their optical, magnetic, electric, and mechanical properties. We report a novel molecular material, {[EuIII(H2O)3(pyrone)4][CoIII(CN)6]}·nH2O (1,
Jakub J. Zakrzewski   +3 more
doaj   +1 more source

4-Hydroxy-6-alkyl-2-pyrones as nucleophilic coupling partners in Mitsunobu reactions and oxa-Michael additions

open access: yesBeilstein Journal of Organic Chemistry, 2014
Two mild and efficient strategies have been developed for the O-functionalisation of 4-hydroxy-6-alkyl-2-pyrones, by using them as nucleophilic partners in oxa-Michael additions and the Mitsunobu reaction.
Michael J. Burns   +3 more
doaj   +1 more source

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