Results 161 to 170 of about 7,607,880 (287)

Liquid Chromatography Coupled With High‐Resolution Mass Spectrometry Profiling of Metabolites in Cassia alata Flower Extracts and Their DPPH Free Radical Scavenging Activity

Analytical Science Advances, Volume 7, Issue 2, December 2026.
ABSTRACT Cassia alata flowers remain phytochemically under‐characterized relative to the leaves. However, floral tissues can harbour distinct and, in some species, more abundant phenolic and flavonoid profiles, representing an unexploited source of antioxidant phytochemicals with potential functional‐food and nutraceutical relevance. Also, Cassia alata
Adonai Yin‐Anaab Kunduzore, Shakira Ibrahim, Auphedeous Yinme Dang‐i, Michael Adu‐Frimpong, Salma Elshamy, Nikolai Kuhnert, James Ziemah   +6 more
wiley   +1 more source

The Diels-Alder Reaction as a Mechanistic Probe for Vibrational Strong Coupling. [PDF]

Angew Chem Int Ed Engl
Muller C, Piejko M, Bascil S, Moran J.
europepmc   +1 more source

Recyclable and Degradable Covalent Adaptable Polymer Networks (CANs) Based on Dynamic Thiol–Yne Reactions

Journal of Applied Polymer Science, Volume 143, Issue 44, November 20, 2026.
Covalent adaptable networks based on activated alkynes, that is, alkynones, and multifunctional thiols (three and tetrafunctional) are tested in two different recycling strategies: (i) mechanical recycling based on their vitrimeric properties and (ii) chemical recycling based on the reversible thiol addition on the vinylene compound.
Farhad Shohraty, Michael F. Agyemang, Michael Klein, Stefan Zechel, Michael Schmitt, Jürgen Popp, Martin D. Hager   +6 more
wiley   +1 more source

Regio-, Diastereo-, and Enantioselective Nitroso-Diels-Alder Reaction of 1,3-Diene-1-carbamates Catalyzed by Chiral Phosphoric Acids.

Journal of the American Chemical Society, 2015
J. Pous, Thibaut Courant, G. Bernadat, B. Iorga, F. Blanchard, G. Masson   +5 more
semanticscholar   +1 more source

Curvature‐Induced Kinetic Trapping in Chemical Reactions

Journal of Computational Chemistry, Volume 47, Issue 30, November 15, 2026.
Reaction path curvature helps to detect obstacles to reaction progress in the absence of activation energy barriers. ABSTRACT Crossing an activation energy barrier in a chemical reaction needs time because enough kinetic energy needs to redistribute into the barrier‐crossing mode.
Bernd Hartke
wiley   +1 more source

Diels-Alder reaction affords circumpyrene tetracarboxydiimide with excited state intramolecular charge transfer character. [PDF]

Commun Chem
Chen Q, Guizzardi M, Méndez F, Ju C, Keller HR, Cerullo G, Osella S, Scotognella F, Paternò GM, Müllen K, Narita A.   +10 more
europepmc   +1 more source

Catalytic asymmetric oxa-Diels-Alder reaction of acroleins with simple alkenes. [PDF]

Nat Commun, 2023
Zeng L, Liu S, Lan Y, Gao L.
europepmc   +1 more source

Well‐Defined Nickel Precatalysts: Form, Function, and Application

Chemistry – A European Journal, Volume 32, Issue 41, 3 November 2026.
This review provides guidance on which nickel precatalysts to choose for a given application or which properties to prioritize in reaction development. A summary of the ease of synthesis, stability, diversity, accessibility, modularity, and general applicability is provided along with a related infographic.
Morgan E. John, George A. Koutsantonis, Reto Dorta, Scott G. Stewart   +3 more
wiley   +1 more source

Achiral benzoic acid appended helical polymers for the copper-catalyzed asymmetric Diels-Alder reaction and Michael addition with excellent enantioselectivity and recyclability. [PDF]

Chem Sci
Ti QH, Mo MY, Gao RT, Liu N, Wu ZQ.
europepmc   +1 more source

Partially Biobased Polyurethanes With Reversibly Crosslinkable Furan Units Toward Recyclable Thermosetting Textile Fibres

Chemistry – A European Journal, Volume 32, Issue 41, 3 November 2026.
A molecular design strategy combines lignin‐derived aromatic units, sugar‐derived furan groups, and flexible glycol segments to create wet‐spinnable polyurethanes. Thermally reversible Diels–Alder crosslinking chemistry enables formation of crosslinked thermosetting fibers, repeated de‐crosslinking/re‐crosslinking cycles, and tunable fiber properties ...
Rafael N. L. Menezes, Fredrik Bäcklund, Tam T. Nguyen, Maria Maukonen, Zengwei Guo, Olga Gordivska, Cecilia Hansson, Baozhong Zhang   +7 more
wiley   +1 more source