Results 31 to 40 of about 3,581 (133)

Turmeric and curcumin: From traditional medicine to modern therapeutic applications

JSFA reports, EarlyView.
Abstract Turmeric (Curcuma longa), a medicinal plant, has maintained its cultural and therapeutic significance over centuries in Ayurveda, Unani, and Traditional Chinese Medicine. However, novel formulations and delivery methods are being developed to address these challenges.
Azma Nadeem, Khurram Afzal, Asad Abbas, Talha Bin Iqbal, Abdul Malik, Javaria Saeed, Mutjardah Zarrish, Bipindra Pandey   +7 more
wiley   +1 more source

Domino reactions of 2H-azirines with acylketenes from furan-2,3-diones: Competition between the formation of ortho-fused and bridged heterocyclic systems

Beilstein Journal of Organic Chemistry, 2014
3-Aryl-2H-azirines react with acylketenes, generated by thermolysis of 5-arylfuran-2,3-diones, to give bridged 5,7-dioxa-1-azabicyclo[4.4.1]undeca-3,8-diene-2,10-diones and/or ortho-fused 6,6a,12,12a-tetrahydrobis[1,3]oxazino[3,2-a:3′,2′-d]pyrazine-4,10 ...
Alexander F. Khlebnikov, Mikhail S. Novikov, Viktoriia V. Pakalnis, Roman O. Iakovenko, Dmitry S. Yufit   +4 more
doaj   +1 more source

2,3‐Dichloro‐5,6‐Dicyano‐1,4‐Benzoquinone (DDQ)‐Mediated CC Bond Formation: Redox Strategies from Stoichiometric to Catalytic Systems

ChemistryOpen, EarlyView.
2,3‐Dichloro‐5,6‐dicyano‐1,4‐benzoquinone serves as a versatile oxidant and redox catalyst for CC bond formation through hydride abstraction or single‐electron transfer. Stoichiometric and catalytic systems enable benzylic, allylic, and aromatic CH activation under mild, metal‐free conditions, providing sustainable routes to complex and bioactive ...
Dohoon Cha, Sun‐Joon Min
wiley   +1 more source

Investigation of the role of stereoelectronic effects in the conformation of piperidones by NMR spectroscopy and X-ray diffraction

Beilstein Journal of Organic Chemistry, 2015
This paper reports the synthesis of a series of piperidones 1–8 by the Mannich reaction and analysis of their structures and conformations in solution by NMR and mass spectrometry.
Cesar Garcias-Morales, David Ortegón-Reyna, Armando Ariza-Castolo   +2 more
doaj   +1 more source

The continuing significance of chiral agrochemicals

Pest Management Science, Volume 81, Issue 4, Page 1697-1716, April 2025.
In the time frame 2018–2023, around 43% of the 35 chiral agrochemicals introduced to the market (herbicides, fungicides, insecticides, acaricides, and nematicides) contain one or more stereogenic centers in the molecule, and almost 69% of them have been marketed as racemic mixtures of enantiomers or stereoisomers.
Peter Jeschke
wiley   +1 more source

Novel Sulfonium Reagents for the Modular Synthesis of Spiro[2.3]Hexanes and Heteroatom‐Containing Analogues: Synthesis, Application, and Evaluation as Bioisosteres

Angewandte Chemie, Volume 138, Issue 5, 28 January 2026.
Strained spirocyclic spiro[2.3]hexane and its heteroatom‐containing derivatives, including previously underrepresented 5‐oxa‐1‐azaspiro[2.3]hexanes and 1,5‐diazaspiro[2.3]hexanes, were synthesized via a modular approach of insertion of cyclobutane‐, oxetane‐, and azetidine‐containing sulfonium reagents into alkenes, carbonyls and imines.
Philipp Natho, Annarita Vicenti, Fabrizio Mastrolorito, Francesca De Franco, Lee Walsh‐Benn, Marco Colella, Ernesto Mesto, Emanuela Schingaro, Orazio Nicolotti, Antimo Gioiello, Renzo Luisi   +10 more
wiley   +2 more sources

Phytochemical Analysis of Veratrum Alkaloids in Medicinal Veratrum Globules Using High‐Performance Liquid Chromatography Coupled With Tandem Mass Spectrometry

Biomedical Chromatography, Volume 40, Issue 3, March 2026.
ABSTRACT Veratrum L. species have been used in traditional medicine for centuries due to their bioactive properties, yet they also contain toxic steroid alkaloids that pose potential health risks when present in herbal preparations. Reliable analytical approaches are therefore essential to ensure product safety, protect consumer health and assess ...
Julia Siegle, Jörg Pietsch
wiley   +1 more source

Making Blank Faces Expressive: Chemical Approaches to the Modification of Chemically Inert Peptides

Journal of Peptide Science, Volume 32, Issue 3, March 2026.
As an alternative to the conventional approach, which combines amino acid monomers in a one‐by‐one fashion to peptide derivatives, the chemical modification of existing peptides has attracted significant attention in recent years. However, such approaches generally target the reactive functional groups in cysteine and lysine residues, particularly in ...
Yoshitaka Moriyama, Hikari Sada, Takeshi Nanjo   +2 more
wiley   +1 more source

Studies on 1-azabicyclo compounds. XXVIII. Synthesis of 1-methyl-perhydroazocin-5-one from pyrrolizidine.

Chemical and Pharmaceutical Bulletin, 1979
Heating of pyrrolizidine N-oxide (V) with an aqueous solution of tartaric acid containing ferric nitrate gave Δ1 (8)-dehydropyrrolizidine (VI), which, on treatment with water in the presence of methyl iodide, gave 1-methyl-perhydroazocin-5-one (IX).
YOSHIO ARATA, KENICHI TANAKA, SHIGEYUKI YOSHIFUJI, SHOICHI KANATOMO   +3 more
openaire   +2 more sources

Results of GC–MS Analyses of 40 Extracts of Diabetes Devices

Contact Dermatitis, Volume 94, Issue 3, Page 234-244, March 2026.
Forty acetone extracts of 27 diabetes devices were investigated by gas chromatography–mass spectrometry. Two hundred eighty four individual chemicals were identified. All 40 extracts contained one or more chemicals that were previously identified as allergens in diabetes devices causing allergic Contact Dermatitis.
Emma M. van Oers, Anton C. de Groot, Patrick Verolme, Norbertus A. Ipenburg, Thomas Rustemeyer   +4 more
wiley   +1 more source