Results 81 to 90 of about 9,191 (227)
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 +3 more
wiley +1 more source
Molecules, 2000 Reaction of 4-hydroxy-6-methyl-2-pyrone (1a) as well as 4-hydroxy-6-methyl-2(1H)-pyridones (1b-d) with arylmethylene malononitriles or arylmethylene methyl cyanoacetates (2a-h) leads to the formation of the very stable 5,6-fused bicyclic 2-amino-4Hpyran ...
Dieter Heber +2 more
doaj +1 more source
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 +5 more
wiley +1 more source
Regioselectivity in the Stille Coupling Reactions of 3,5-Dibromo-2-pyrone
, 2016 The Stille couplings of 3,5-dibromo-2-pyrone normally take place regioselectively at C3, lower in electron density than C5, thus oxidative addition proceeds faster .
Hyung-Jin Kim (1427263) +2 more
core +1 more source
Protective Effects of Dimedone Pyrone on Podocytes in Rats with Diabetic Nephropathy
, 2015 Purpose: To investigate the effect of dimedone pyrone (DP) on podocytes in rats with diabetic nephropathy (DN).Methods: The rats were randomly assigned into 5 experimental groups (n = 10), viz, non-diabetic control with no treatment (ND/NT), diabetic ...
Luan, B, Sun, C
core +1 more source
Novel biotransformation of a 2-pyrone to a substituted benzoic acid
, 1985 It was found that Macrophoma commelinae (IFO 9570) had an ability to transform 5-acetyl-4-methoxy-6-methyl-2-pyrone (1) to 4-acetyl-3-methoxy-5-methylbenzoic acid (2). This biotransformation was investigated using 13C- and 14C-labeled compounds.
Suzuki, Harumi +12 more
core +2 more sources
Some Aspects of Pyrone Synthesis and Stability
, 1967 Two methods for the preparation of [gamma]-pyronocoumarins have been performed; the ring closure of an o- hydroxy- [beta] - ketoacetylcoumarln and the Kostanecki-Robinson reaction of an o-hydroxy-acetylcoumarln.
Horinek, Ronald Louis
core +1 more source
Density functional study of 4-pyrone and 2-pyrone
, 2003 7-10Density functional (B3LYP) calculations using 6-31 G* have been made to estimate the bond lengths and angles for 4-pyrone and 2-pyrone. The predicted bond lengths and angles for 4-pyrone are in excellent agreement with experimental results ...
Ralhan, Sonia +2 more
core
Contribution of Pyrone-Type Structures to Carbon Basicity: An ab Initio Study
, 2016 The contribution to carbon basicity of pyrone-type structures is examined in this work by carrying out ab initio calculations on various cluster models. The different basic sites in a bicyclic pyrone structure are studied at the MP2/6-311+G(2d,2p)//MP2/6-
Enrique Fuente (2488285) +3 more
core +1 more source
, 2016 Readily prepared from the regioselective Pd-catalyzed coupling reactions of 3,5-dibromo-2-pyrone, 3-bromo-2-pyrone-5-carboxylates undergo tandem uninterrupted sequential Diels−Alder cycloaddition reactions with allyl vinyl ethers in a highly regio- and ...
Cheon-Gyu Cho (1725187) +2 more
core +2 more sources