Results 71 to 80 of about 15,469 (227)

14-Ethoxy-4,6,9-trimethyl-8,12-dioxa-4,6-diazatetracyclo[8.8.0.02,7.013,18]octadeca-2(7),13,15,17-tetraene-3,5,11-trione

Acta Crystallographica Section E, 2013
In the title compound, C19H20N2O6, the pyrone and pyran rings adopt envelope conformations with the same common C atom as the flap, the dihedral angle between the planes of the remaining ring atoms being 68.27 (4)°.
G. Jagadeesan, D. Kannan, M. Bakthadoss, S. Aravindhan   +3 more
doaj   +1 more source

Synthesis and antibacterial activities of enamine derivatives of dehydroacetic acid [PDF]

, 2017
Dehydroacetic acid is a common pyrone derivative used commercially as an antibacterial and antifungal agent. Based on the synthesis of dehydroacetic acid (1) from N-hydroxysuccinimdyl acetoacetate, a novel series of enamine-based derivatives were ...
Baldwin, Alex, Bevan, Jonathan, Brough, David, Freeman, Sally, Ledder, Ruth   +4 more
core   +2 more sources

Bioactive Phytochemical Compounds in Medicago sativa L. (Alfalfa): A Systematic Review of Biological Properties and Therapeutic Relevance in Nutraceutical and Functional Food Implications

Food Frontiers, Volume 7, Issue 2, March 2026.
ABSTRACT Medicago sativa L. (alfalfa) harbors a remarkably diverse reservoir of bioactive secondary metabolites. Flavonoids, isoflavones, and triterpenoid saponins dominate its bioactivity landscape, driving potent antioxidant, anti‐inflammatory, antimicrobial, estrogenic, hypolipidemic, and cytotoxic actions through redox modulation, membrane ...
Parham Joolaei Ahranjani, Hamid Rashidi Nodeh, Zahra Esfandiari, Giovanna Ferrentino   +3 more
wiley   +1 more source

Electrochemical Corey–Winter reaction. Reduction of thiocarbonates in aqueous methanol media and application to the synthesis of a naturally occurring α-pyrone

Beilstein Journal of Organic Chemistry, 2018
An electrochemical version of the Corey–Winter reaction was developed giving excellent results in aqueous methanol media (MeOH/H2O (80:20) with AcOH/AcONa buffer 0.5 M as supporting electrolyte), using a reticulated vitreous carbon as cathode in a ...
Ernesto Emmanuel López-López, José Alvano Pérez-Bautista, Fernando Sartillo-Piscil, Bernardo A. Frontana-Uribe   +3 more
doaj   +1 more source

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

Green 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, Yuncan Chen, Yi Luo, Jianglian Li, Ruizhi Lai, Zengbao Yang, Yuerong Wang, Yong Wu   +7 more
doaj   +1 more source

Syntheses of 3-[(Alkylamino)methylene]-6-methyl-1Hpyridine-2,4-diones, Fluorescence Probes 3-Substituted 7-Methyl-6H-pyrano[3,2-c]pyridine-2,5-diones, and Tetrahydro-6H-2,10-dioxa-9-azaanthracen-1-ones [PDF]

, 2014
Various condensation and ring-closing reactions were used for the syntheses of 3-[(alkylamino)methylene]-6-methylpyridine-2,4(1H,3H)-diones, bicyclic pyridinones, and tricyclic morpholinopyrones. For instance, 3-[(dialkylamino)methylene]-6-methylpyridine-
Chang, Kyeong-ok, Desper, John, Gunaratna, Medha J., Hua, Duy H., Jin, Lee-Way, Kikuchi, Daisuke, Kim, Yunjeong, Maezawa, Izumi, Prior, Allan M.   +8 more
core   +1 more source

Traditional Chinese Medicine as an Integrative Adjunct in Oncology Perioperative Practice: Analgesia, Immune Modulation, and Translational Challenges

Medicine Bulletin, Volume 2, Issue 2, Page 184-204, March 2026.
ABSTRACT Traditional Chinese medicine (TCM), including herbal analgesic adjuvants and acupuncture‐based interventions, has gained increasing attention as an integrative strategy for perioperative pain management in oncology. Bioactive phytochemicals—such as terpenoids, flavonoids, alkaloids, and polyphenols—exert multimodal pharmacological effects ...
Yuqin Tang, Zheng Luo, Xu Zhao, Yongqiang Zhang, Mingyang Sun, Jiaqiang Zhang   +5 more
wiley   +1 more source

Enhancing Neural Stem Cell Proliferation Using Polyurethane/CNT Scaffolds Functionalized With Liposomal Hesperidin for Neural Tissue Engineering

Nano Select, Volume 7, Issue 3, March 2026.
A multifunctional electrospun scaffold combining polyurethane, carbon nanotubes, and liposomal hesperidin supports neural stem cell survival, adhesion, and expansion. This platform enhances conductivity, mechanical strength, and hydrophilicity while mimicking the native neural environment.
Arman Abroumand Gholami, Amir Mahdi Molavi, Meshkat Omrannezhad, Tahere Mokhtari, Shokoufeh Rahmani, Payam Moharreri, Fatemeh Gheybi, Fatemeh Tahmasebi, Hamideh Babaloo   +8 more
wiley   +1 more source

Crystal structure of methyl 6-methoxy-11-(4-methoxyphenyl)-16-methyl-14-phenyl-8,12-dioxa-14,15-diazatetracyclo[8.7.0.02,7.013,17]heptadeca-2(7),3,5,13(17),15-pentaene-10-carboxylate

Acta Crystallographica Section E, 2014
In the title compound, C30H28N2O6, the pyran ring adopts a slightly distorted half-chair conformation and the pyrone ring adopts an envelope conformation, with the C atom bearing the carboxylate group as the flap. The pyrazole ring [maximum deviation = 0.
V. Vinayagam, M. Bakthadoss, S. Murugavel, N. Manikandan   +3 more
doaj   +1 more source

Adsorption Behaviour of [(4-Hydroxy-6-methyl-2-oxo-2Hpyran- 3-yl)-(4-methoxy-phenyl)-1methyl]-urea on Stainless Steel in Phosphoric Media [PDF]

, 2009
The adsorption of [(4-hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)-(4-methoxy-phenyl)- methyl]-urea on iron in phosphoric media was studied by using electrochemical technique. The adsorption mechanism was investigated using adsorption isotherms.
Ajanaku, K. O., Ajani, Olayinka O., James, O. O., John, M. O., Ogunniran, K. O.   +4 more
core   +3 more sources