Results 121 to 130 of about 18,216 (235)

Amides and formamidines with antinociceptive activity: note II [PDF]

open access: yes, 1993
Forty amides, formamidines and trifluoromethylsulfonylamides bearing on the nitrogen a cyclohexyl residue, eventually 2-substituted, were prepared and tested for analgesic activity against a chemical stimulus.
Boatto, Gianpiero   +6 more
core  

NMR‐Based Structural Analysis of Highly Substituted Pyridines From Kondrat'eva Aza‐Diels–Alder Cycloadditions

open access: yesMagnetic Resonance in Chemistry, Volume 64, Issue 3, Page 324-332, March 2026.
We report the results from a kinetic and mechanistic investigation of an inverse‐electron‐demand Diels–Alder (IEDDA) cycloaddition involving an oxazole‐type diene synthesized via an Ugi–Zhu multicomponent reaction (UZ‐3CR). ABSTRACT Pyridines are a crucial class of heterocycles with widespread applications in natural products, pharmaceuticals, and ...
Galdina V. Suárez‐Moreno   +6 more
wiley   +1 more source

Genome‐wide association study identifies consistent genomic loci for yield and nutritional quality in Ethiopian sorghum landraces

open access: yesThe Plant Genome, Volume 19, Issue 1, March 2026.
Abstract Identifying genomic regions linked to yield and quality is crucial for sorghum (Sorghum bicolor L.) improvement, but limited studies on its genome and diversity hinder breeding efforts. This study aimed to identify phenotypic variance and common quantitative trait nucleotides (QTNs) associated with genomic regions linked with grain yield and ...
Chalachew Endalamaw   +7 more
wiley   +1 more source

Stereoselective cathodic synthesis of 8-substituted (1R,3R,4S)-menthylamines

open access: yesBeilstein Journal of Organic Chemistry, 2015
The electrochemical generation of menthylamines from the corresponding menthone oximes equipped with an additional substituent in position 8 is described. Due to 1,3-diaxial interactions a pronounced diastereoselectivity for the menthylamines is found.
Carolin Edinger   +2 more
doaj   +1 more source

Strain‐Release Diversification of 1‐Azabicyclobutanes via Bromide/Nickel Relay Catalyzed 1,3‐Bis‐Carbofunctionalization

open access: yesAngewandte Chemie International Edition, Volume 65, Issue 7, 9 February 2026.
A four‐component synthesis of azetidines with an all‐carbon quaternary center via strain‐release 1,3‐bis‐carbofunctionalization of 1‐azabicyclobutanes (ABB) is described. Each reaction component can be modified to permit a high‐throughput‐like library preparation, producing azetidines with various appendages, including biorelevant molecules.
Yi‐Hua Lee   +10 more
wiley   +1 more source

SÍNTESE, CARACTERIZAÇÃO E AVALIAÇÃO DA ATIVIDADE CITOTÓXICA DE COMPOSTOS CICLOPALADADOS CONTENDO COMO LIGANTES BENZALDEIDOXIMA ORTOMETALADA E ETILENOTIOURÉIA

open access: yesQuímica Nova
The halide-bridge cleavage reaction of the [Pd(C2 ,N-bzox)(µ-Cl)]2 compound (bzox = benzaldehydeoxime) with ethylenethiourea (L) in the 1:2 molar ratio at room temperature yielded the cyclopalladated compound [Pd(C2 ,N-bzox)(Cl)(L)] (1) whose replacement
Nathália A. Thomazella   +6 more
doaj   +1 more source

Strain‐Activated Photo‐Dehalogenation Unlocks Low‐Energy One and Two‐Photon 3D Microfabrication

open access: yesAdvanced Functional Materials, Volume 36, Issue 13, 12 February 2026.
5,14‐NMI‐Cz acts, conversely to its 7,10‐NMI‐Cz(7,10‐'dibromo‐2‐(2,6‐diisopropylphenyl)‐1H‐benzo[lmn]carbazolo[9,1‐bc][2,8]phenanthroline‐1,3(2H)‐dione) counterpart, as modular photoinitiator with panchromatic photoactivity, featuring a weak C–Br bond from geometric strain for efficient Type I & II initiation. These studies demonstrate applicability of
Kacper Piskorz   +10 more
wiley   +1 more source

Diazirines Beyond Photoaffinity Labeling: A Comprehensive Overview of Applications in Biological Sciences, Materials Chemistry, and NMR‐Spectroscopy

open access: yesAngewandte Chemie, Volume 138, Issue 4, 22 January 2026.
Diazirines are three‐membered, nitrogen‐containing heterocycles that decompose under light or heat to generate carbenes. For the past two decades, they have served mainly as minimally invasive tags in photoaffinity labeling (PAL). More recently, their value as versatile carbene precursors has been recognized.
Dominik Schnalzer   +4 more
wiley   +2 more sources

Submicron Patterning Techniques for Perovskite Optoelectronics From Materials Challenges to Scalable Device Integration

open access: yesAdvanced Optical Materials, Volume 14, Issue 6, 9 February 2026.
This review highlights submicron patterning strategies for metal halide perovskites, focusing on solvent compatibility, resolution, and alignment toward scalable integration in advanced optoelectronic systems. Abstract Halide perovskites are promising materials for future optoelectronic and display systems.
Dante Ahn   +4 more
wiley   +1 more source

Structure–Reactivity Relationships of Oxime–Oxalate/Glyoxylate/Ester Derivatives: Dual Photo/Thermal Initiators for Visible Light Polymerization and Composite Preparation

open access: yesAngewandte Chemie, Volume 138, Issue 4, 22 January 2026.
OP1, a newly synthesized nitro‐carbazole oxime oxalate, shows superior Type I photoinitiation under blue LEDs and sunlight due to efficient decarboxylation. It enables high‐resolution 3D printing, offers dual photo/thermal initiation, lower cytotoxicity than TPO, and provides insights for designing sustainable photoinitiators.
Tong Gao   +11 more
wiley   +2 more sources

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