An Overview of α-Pyrones as Phytotoxins Produced by Plant Pathogen Fungi [PDF]
MoleculesCrop diseases negatively affect the quality and quantity of agricultural products, with significant economic and social consequences. These problems become emergencies in a world where the safe production of food for human health is becoming increasingly
Antonio Evidente
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A Three-Step Route to Functionalized Pyrrole-2,5-Dicarboxylic Acids from Galactaric Acid. [PDF]
ChemSusChemGalactaric acid (GalA) has been used as substrate for a library of N‐substituted pyrrole‐2,5‐dicarboxylic acids (PDCAs). Existing routes to N‐substituted PDCAs require many steps or lack product isolation. We present a simple, scalable three‐step synthesis from GalA via a 2‐pyrone salt, giving isolated PDCA derivatives in high yield without ...
Trapasso G +3 more
europepmc +2 more sources
Recent Advances in the Synthesis of 2-Pyrones [PDF]
Marine Drugs, 2015 The present review summarizes the recent progresses in the synthesis of 2-pyrones and the application to the synthesis of marine natural products. Especially, much attention was placed on the transition metal catalyzed synthetic methodologies in this ...
Jong Seok Lee
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Modular synthesis of aryl amines from 3-alkynyl-2-pyrones. [PDF]
Chem SciThe synthesis of aryl amines from 3-alkynyl-2-pyrones and various amines is described. Mechanistically, the aryl amines are proposed to arise from the 3-alkynyl-2-pyrone substrates through their selective opening in a 1,6-fashion by secondary amines ...
Gardner KE +6 more
europepmc +3 more sources
Goondapyrones A–J: Polyketide α and γ Pyrone Anthelmintics from an Australian Soil-Derived Streptomyces sp. [PDF]
AntibioticsAn investigation of ×19 soil samples collected under the auspices of the Australian citizen science initiative, Soils for Science, returned ×559 chemically dereplicated microbial isolates, of which ×54 exhibited noteworthy anthelmintic activity against ...
Shengbin Jin +7 more
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Eight new α-pyrone and γ-butenolide derivatives from the plant endophytic fungus Diaporthe sp. CCY4 [PDF]
Natural Products and BioprospectingFive new α-pyrones, diaporpyrones G-K (1–5) and three new γ-butenolide derivatives, porbutenolides A-C (6–8), along with seven known compounds (9–15), were isolated from the culture extract of the endophytic fungus Diaporthe sp. CCY4.
Jie-Chun Zeng +4 more
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Regioselective Reversal Cyclization To Access either Eight-Membered Sulfur-Containing Heterocycle-Fused γ‑Pyrones or 2‑(1,4-Dithianyl)-4-pyrones from the Same Precursors [PDF]
, 2020 A regioselective reverse strategy for the construction of eight-membered sulfur-containing heterocycle-fused γ-pyrones and 2-(1,4-dithianyl)-4-pyrones starting from 2-diazo-γ-pyrones and dithioacetals was achieved for the first time. The process combines
Jianfang Zhang (2105581) +3 more
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Oxidative Ring-Opening Transformation of 5‑Acyl-4-pyrones as an Approach for the Tunable Synthesis of Hydroxylated Pyrones and Furans [PDF]
, 2023 A selective and tunable approach for oxidation of 4-pyrones has been developed via ring-opening transformations leading to various hydroxylated oxaheterocycles. The first step of the strategy includes the base-catalyzed epoxidation of 5-acyl-4-pyrones in
Viktoria V. Viktorova (16704519) +11 more
core +1 more source
One-pot synthesis of trisubstituted 2-pyrones and polysubstituted phenols through Zn catalyzed cascade of ynone/condensation/elimination reactions [PDF]
, 2023 An efficient multicomponent method is described for the synthesis of a variety of trisubstituted 2-pyrones and polysubstituted phenols based on the Zn-catalyzed cascade reactions between ynone compounds and active methylene group containing diesters. The
Sridhar Chidara (11744681) +3 more
core +1 more source
The chemistry of Brazilian Lauraceae. LXV. 5, 7, 8, 3', 4', 5' - Hexamethoxyflavone from an Aniba species [PDF]
Acta Amazonica, 1982 Aniba species (Lauraceae) are characterized by the presence of neolignans or of 6-aryl (or 6-styryl-) 2-pyrones. Flavonoids occur either together with pyrones or, in rare cases, as predominant micromolecular type. The branch wood of an Aniba species from
Sergio de H. Cavalcante +3 more
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