Synthesis of cyercenes and yangonin by a pyrone aldol protocol
Results in Chemistry, 2021 A number of 6-alkenyl pyrones were synthesized using an aldol reaction followed by a tosylate elimination sequence.
Kyle Podolak, George A. Kraus
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Nocapyrones A−D, γ-Pyrones from aNocardiopsisStrain Isolated from the Marine SpongeHalichondria panicea [PDF]
, 2010 Four new γ-pyrones, nocapyrones A−D (1−4), were isolated from an organic extract of the Nocardiopsis strain HB383, which was isolated from the marine sponge Halichondria panicea. These are the first γ-pyrones reported from a Nocardiopsis strain.
Imhoff, Johannes F. +5 more
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Tricarbonyl(η6-flavone)chromium(0)
Acta Crystallographica Section E, 2009 In the title compound, [Cr(C15H10O2)(CO)3], the Cr(CO)3 unit exhibits a three-legged piano-stool conformation. The chromium metal centre is coordinated by the phenyl ring of the flavone ligand [Cr—(phenyl centroid) distance = 1.709 (1)
Johannes H. van Tonder +2 more
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Structure determination of a 4-pyrone from the liverwort Plagiochila bifaria (Sw.) Lindenb. (Plagiochilaceae) [PDF]
, 2008 The centenary of the presentation in 1907 of the "polyketide" hypothesis by Collie, along with his use of a 4-pyrone as an example, is marked by reporting the discovery and isolation of 2-(3,4-dimethoxyphenethyl)-6-methyl-4-pyrone from <i> ...
Rycroft, D.S.
core
Convergent Total Synthesis of 16β‐Hydroxylpseudobufarenogin
Angewandte Chemie International Edition, EarlyView.We present a novel convergent strategy that integrates Pd/Ag‐promoted Suzuki–Miyaura coupling with Ir‐catalyzed radical‐relay cyclization, enabling the first total synthesis of 16β‐hydroxylpseudobufarenogin. This approach is broadly applicable to the total synthesis of various oxygenated bufadienolides by simply modifying the fragment structures ...
Wataru Shigematsu +3 more
wiley +1 more source
Marine Drugs, 2017 Intensive study of the organic extract of the marine-derived bacterium Saccharomonospora sp. CNQ-490 has yielded three new α-pyrones, saccharomonopyrones A–C (1–3).
Chae-Yoon Yim +12 more
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Bioactive Alpha-Pyrone and Phenolic Glucosides from the Marine-Derived Metarhizium sp. P2100
Journal of Fungi, 2022 Glycoside compounds have attracted great interest due to their remarkable and multifarious bioactivities. In this study, four hitherto unknown 4-methoxy-β-D-glucosyl derivatives were obtained and identified from the marine-derived fungus Metarhizium sp ...
Zhong-Lian Ma +9 more
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Harnessing Photoenzymatic Systems for Intermolecular C-H Fluorination. [PDF]
Angew Chem Int Ed EnglDespite the remarkable versatility of enzymes for catalyzing complex organic transformations under mild aqueous conditions, no biocatalytic system has been reported for intermolecular C–H fluorination. A radical photoenzymatic approach is introduced that leverages a designed de novo protein scaffold with an unnatural amino acid to achieve precise ...
Zhou Y +7 more
europepmc +2 more sources
Degradation of Chloroaromatics: Purification and Characterization of a Novel Type of Chlorocatechol 2,3-Dioxygenase of Pseudomonas putida GJ31 [PDF]
, 1998 A purification procedure for a new kind of extradiol dioxygenase, termed chlorocatechol 2,3-dioxygenase, that converts 3-chlorocatechol productively was developed.
Janssen, Dick B., +5 more
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From Zn to Mn: the study of novel manganese-binding groups in the search for new drugs against tuberculosis. [PDF]
, 2011 In most eubacteria, apicomplexans, and most plants, including the causal agents for diseases such as malaria, leprosy, and tuberculosis, the methylerythritol phosphate pathway is the route for the biosynthesis of the C(5) precursors to the essential ...
de Oliveira, César Augusto F +3 more
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