Results 61 to 70 of about 14,691 (260)
Synthesis and chemical properties of 3-acyl- and 3-carbethoxy-4-pyrones [PDF]
, 2013 Реакция 1-арил-2-диметиламинометиленбутан-1,3-дионов с диэтиоксалатом в присутствии гидрида натрия в ТГФ приводит к образованию этил 5-ароил-4-оксо-4Н-пиран-2- карбоксилатам, из которых 4-оксо-6-арил-4Н-пиран-2-карбоновые кислота (6- арилкомановая ...
Obydennov, D. L. +1 more
core
Molecules, 2019 An ultra-high-performance liquid chromatographic (UHPLC) separation was developed for six kava pyrones (methysticin, dihydromethysticin (DHM), kavain, dihydrokavain (DHK), desmethoxyyangonin (DMY), and yangonin), two unidentified components, and three ...
Yijin Tang, Christine Fields
doaj +1 more source
Organocatalytic Lewis base functionalisation of carboxylic acids, esters and anhydrides via C1-ammonium or azolium enolates [PDF]
, 2014 This tutorial review highlights the organocatalytic Lewis base functionalisation of carboxylic acids, esters and anhydrides via C1-ammonium/azolium enolates.
Morrill, Louis C., Smith, Andrew D.
core +1 more source
Harnessing Photoenzymatic Systems for Intermolecular C–H Fluorination
Angewandte Chemie, Volume 138, Issue 5, 28 January 2026.Despite 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 ...
Yu Zhou +7 more
wiley +2 more sources
MedComm, Volume 7, Issue 4, April 2026.This graphical abstract shows the antibacterial potential of phytochemicals from 15 spices, showcasing key compounds, their extraction methods, and mechanisms of action. It highlights membrane disruption, ROS generation, enzyme inhibition, and biofilm prevention as core antibacterial pathways.
Hettiyahandi Binodh De Silva +3 more
wiley +1 more source
Two Pyrones with Antibacterial Activities from
Natural Product Communications, 2016 A new pyrone derivative, malakavalactone ( 2 ), was isolated from the acetone extract of Alpinia malaccensis fruits, along with a known compound kavalactone ( 1 ).
Tita Juwitaningsih +2 more
doaj +1 more source
PLoS ONE, 2021 Aspergillus niger metabolites exhibited a wide range of biological properties including antioxidant and neuro-protective effects and some physical properties as green synthesis of silver nanoparticles AgNP. The present study presents a novel evidence for
Ghada Mahmoud Abdelwahab +5 more
doaj +1 more source
Synthesis of fluorinated oxygen- and sulfur-containing heteroaromatics [PDF]
, 2017 Milk protein concentrate (79% protein) reconstituted at 13.5% (w/v) protein was heated (90 °C, 25 min, pH 7.2) with or without added calcium chloride.
Jones, David J. +3 more
core +1 more source
Natural Product Research, 2017 The EtOAc extract of the liquid fermentation of Alternaria sp. Samif01, an endophytic fungus obtained from Salvia miltiorrhiza Bunge, showed antibacterial activity against several tested bacterial pathogens.
Jin-Ying Tian +8 more
semanticscholar +1 more source