Results 151 to 160 of about 23,225 (270)

Triplet 4‐Nitrenemethyl‐Pyridine‐N‐Oxide: A Model Alkyl Nitrene Isolated in Cryogenic Matrices

Journal of Physical Organic Chemistry, Volume 39, Issue 5, May 2026.
The simplest triplet alkyl nitrene bearing a pyridine‐N‐oxide moiety was generated by direct irradiation (λ > 350 nm) of the corresponding azide in an Ar matrix at 15 K. Quantum tunneling 1,2‐H shift to the corresponding imine is thermodynamically favorable but does not occur due to a high‐energy barrier (~36 kcal mol−1).
Cláudio M. Nunes, A. J. Lopes Jesus, Tatiana Caneca, Gemma Aragay, Pablo Ballester, Rui Fausto   +5 more
wiley   +1 more source

Mild and efficient synthesis of carbamates using dioxazolones as bench-stable isocyanate surrogates: application in AChE-inhibiting agent development. [PDF]

RSC Adv
Wu Y, Liu X, Zuo F, Ding Y, Kang J, Wu J, Tang W, Zhang J.   +7 more
europepmc   +1 more source

Bio‐Based Polyurethanes: Mechanical Performance, Structure–Property Relationships, and Future Directions

Journal of Polymer Science, Volume 64, Issue 9, Page 1860-1894, 1 May 2026.
This review examines bio‐based polyurethanes from renewable feedstocks, focusing on structure‐property relationships governing mechanical performance. It analyzes reinforcement strategies, benchmarks against petrochemical counterparts, and explores future directions, including non‐isocyanate routes and circular economy integration for sustainable high ...
Khaled Chawraba, Hussein Medlej, Mohamad Sakr, Akram Hijazi, Abrar Hussain   +4 more
wiley   +1 more source

Saccharides-Based Polymers for Low Environmental Impact Adhesive Formulations. [PDF]

ACS Omega
Cappitti A, Bianchini E, Monaci U, Martella D, Pizzo B, Frediani M, Salvini A.   +6 more
europepmc   +1 more source

Effect of Matrix Properties on Quasi‐Static and Fatigue Properties of Thermosetting Polyurethane and Its GFRP Composites

Fatigue &Fracture of Engineering Materials &Structures, Volume 49, Issue 5, Page 1929-1943, May 2026.
ABSTRACT In this study, the influence of resin cross‐link density on thermomechanical properties and fatigue behavior of polyurethane resins and glass fiber‐reinforced polyurethane (PUR‐GFRP) composites was investigated. This material is a candidate for renewable energy applications like rotor blades in wind turbines.
Martin Demleitner, Daniel Raps, Sarah Mäker, Qi Chen, Alexander Brückner, Holger Ruckdäschel   +5 more
wiley   +1 more source

Small‐Molecule Activation of mRNA Translation by Click‐to‐Release Reaction in Cells

Angewandte Chemie, Volume 138, Issue 16, 13 April 2026.
A new method to control mRNA activity using bioorthogonal click‐to‐release reactions is presented. The 5′ cap is modified with a trans‐cyclooctene (TCO) that quickly reacts with hydroxyaryl‐tetrazines and efficiently releases the native cap 0. TCO‐capped mRNAs are initially translationally inactive but can be activated with non‐toxic, cell‐permeable ...
Tess Vosman, Friedrich Burba, Martin Sumser, Milan Vrabel, Hannes Mikula, Andrea Rentmeister   +5 more
wiley   +2 more sources

Additive-Controlled Divergent Synthesis of Amides and Ketones via Ni/Photoredox-Catalyzed Deoxygenative Functionalization of Alcohols. [PDF]

JACS Au
Xu P, Ma C.
europepmc   +1 more source

A Study of Polymers Containing Silicon-nitrogen Bonds Annual Summary Report, 4 May 1966 - 3 Jun. 1967 [PDF]

Polymers containing silicon-nitrogen ...
Burks, R. E., Jr., Greene, J. L., Jr.
core   +1 more source

Cyclic carbamates from epoxides and isocyanates catalysed by inorganic salts. [PDF]

RSC Adv
Holland J, Clark RA, Shaver MP.
europepmc   +1 more source

Synthesis of Sulfur Heterocycles by Palladium‐Catalyzed Cyclization

European Journal of Organic Chemistry, Volume 29, Issue 14, 15 April 2026.
In spite of the well‐known palladium thiophilicity, sulfur‐containing acyclic substrates may efficiently undergo several different kinds of palladium‐catalyzed cyclization processes leading to highly important sulfur heterocycles in one synthetic step. Advances in this challenging and stimulating field of research are presented in this review.
Bartolo Gabriele
wiley   +1 more source