Results 61 to 70 of about 6,535 (185)

Activation of the Nuclear Factor E2-Related Factor 2 Pathway by Novel Natural Products Halomadurones A–D and a Synthetic Analogue

Marine Drugs, 2013
Two novel chlorinated pyrones, halomadurones A and B, and two novel brominated analogues, halomadurones C and D, were isolated from a marine Actinomadura sp. cultivated from the ascidian Ecteinascidia turbinata.
Thomas P. Wyche, Miranda Standiford, Yanpeng Hou, Doug Braun, Delinda A. Johnson, Jeffrey A. Johnson, Tim S. Bugni   +6 more
doaj   +1 more source

7,7′-Dihydroxy-4,4′-dimethyl-3,4-dihydro-2H,2′H-4,6′-bichromene-2,2′-dione

Acta Crystallographica Section E, 2011
The title compound, C20H16O6, which contains one chiral centre, crystallizes as a racemate. The mean planes of the two coumarin units make a dihedral angle of 88.07 (2)°.
M. Ramos Silva, Ali Mohammed Malla, Akhtar Ali, Mehtab Parveen, P. S. Pereira Silva   +4 more
doaj   +1 more source

Synthetic and Structure-Activity Relationship of Insecticidal Bufadienolides

Natural Product Communications, 2014
A new synthetic analog of bufadienolide, methyl isobryophyllinate A ( 1 ), and a known synthetic analog, methyl isobersaldegenate-1,3,5-orthoacetate ( 2 ), were obtained by methanolysis of bryophyllin A ( 3 ) and bersaldegenin-1,3,5-orthoacetate ( 5 ) in
Ace Tatang Hidayat, Achmad Zainuddin, Danar Dono, Wawan Hermawan, Hideo Hayashi, Unang Supratman   +5 more
doaj   +1 more source

Verrucisidinol and Verrucosidinol Acetate, Two Pyrone-Type Polyketides Isolated from a Marine Derived Fungus, Penicillium aurantiogriseum

Marine Drugs, 2010
The new secondary metabolites verrucosidinol (1) and its derivative verrucosidinol acetate (2), together with a potent neurotoxin verrucosidin (3), a congener norverrucosidin (4) and a mixture of two known phytotoxic metabolites terrestric acids (5 and 6)
Huanqin Dai, Lixin Zhang, Fuhang Song, Jinsheng Sun, Caixia Chen, Junli Wei, Biao Ren, Ke Yu   +7 more
doaj   +1 more source

Reshaping the 2-Pyrone Synthase Active Site for Chemoselective Biosynthesis of Polyketides. [PDF]

Angew Chem Int Ed Engl, 2023
Zhou Y, Mirts EN, Yook S, Waugh M, Martini R, Jin YS, Lu Y.   +6 more
europepmc   +1 more source

Gombapyrones E and F, New α-Pyrone Polyenes Produced by Streptomyces sp. KMC-002

Molecules, 2011
Microorganism-derived polyene polyketides have been shown to display a variety of biological activities and have attracted great interest due to their structurally intriguing chemical diversity.
Kang Ro Lee, Hak Cheol Kwon, Hyun Ok Yang, Hyun Bong Park   +3 more
doaj   +1 more source

Preparative Separation of Main Ustilaginoidins from Rice False Smut Balls by High-Speed Counter-Current Chromatography

Toxins, 2016
Ustilaginoidins are bis-naphtho-γ-pyrone mycotoxins isolated from the rice false smut balls (FSBs) infected by the pathogen Villosiclava virens in rice spikelets on panicles.
Weibo Sun, Xuejiao Dong, Dan Xu, Jiajia Meng, Xiaoxiang Fu, Xiaohan Wang, Daowan Lai, Ligang Zhou, Yang Liu   +8 more
doaj   +1 more source

Multi-step biosynthesis of the biodegradable polyester monomer 2-pyrone-4,6-dicarboxylic acid from glucose. [PDF]

Biotechnol Biofuels Bioprod, 2023
Zhou D, Wu F, Peng Y, Qazi MA, Li R, Wang Y, Wang Q.   +6 more
europepmc   +1 more source

Design, Synthesis, and Characterization of Novel Phosphorescent Iridium Complexes with Pyrone Auxiliary Ligands and ppy/dfppy/piq Cyclometalating Ligands

Inorganics
To develop high-performance iridium phosphorescent complexes, we designed and synthesized a series of iridium phosphorescent complexes (G-1, G-2, B-1, B-2, R-1, R-2) using 3-hydroxy-2-methyl-4-pyrone (maltol, short for mal) and 3-hydroxy-2-ethyl-4-pyrone
Wen Jiang, Leyuan Wang, Xiangguang Li, Caixian Yan, Qiaowen Chang   +4 more
doaj   +1 more source

Coumarin (5,6-Benzo-2-pyrone) Trapping of an HDDA-Benzyne. [PDF]

Org Lett, 2021
Chinta BS, Lee D, Hoye TR.
europepmc   +1 more source