Results 61 to 70 of about 29,220 (210)

Synthesis of Novel Fused Heterocycles Based on Pyrano[2,3-c]pyrazole

Molecules, 1998
3-Substituted 1,2,4-triazole derivatives (5, 9, 13, 16b, 19), pyrimidinium salts (21), triazines (24), and aryl methylene hydrazono pyrazolopyrano-pyrimidine (27a,b) which are rearranged in basic medium to 30a,b, were afforded via the reaction of 6-amino
M. E. A. Zaki
doaj   +1 more source

Corn response to biological products and a nitrification inhibitor

Agrosystems, Geosciences &Environment, Volume 9, Issue 2, June 2026.
Abstract Atmospheric nitrogen (N2) is converted into ammonia (NH3), a form that plants can use, through biological nitrogen (N) fixation by various microorganisms and bacterial genera. This study assessed the field performance of three biological N‐fixing products, or biostimulants (BS), including Gluconacetobacter diazotrophicus (BS1), Klebsiella ...
Rose M. Paul, Gurbir Singh, Kelly A. Nelson, Gurpreet Kaur   +3 more
wiley   +1 more source

Síntese e caracterização de novos materiais funcionais contendo 1,2,4-oxadiazol, 1,3,4-oxadiazol e 1,2,3-triazol [PDF]

, 2014
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Química, Florianópolis, 2014Neste trabalho de tese de doutorado são apresentadas as sínteses ecaracterizações de três novas ...
Girotto, Edivandro
core  

Azine Derivatives as a New Generation of Insect Growth Regulators

CHIMIA, 2003
A new generation of insect-growth-regulator insecticides, the azines, are presented. They inhibit the chitin biosynthesis process and are active against lepidopteran pests. Their synthesis and a structure–activity relationship will be discussed.
Martin Eberle, Saleem Farooq, André Jeanguenat, Deborah Mousset, Arthur Steiger, Stephan Trah, Werner Zambach, Alfred Rindlisbacher   +7 more
doaj   +1 more source

Metal–Organic Frameworks as Programable Platforms for Micro‐ and Optoelectronics: From Dielectrics to Semiconductors and White‐Light Emitters

Small Science, Volume 6, Issue 6, June 2026.
Programable metal–organic framework (MOF) architectures are revealed as versatile micro‐ and optoelectronic platforms, spanning low/high‐κ dielectrics, semiconductive frameworks, and electrically driven phosphor‐free white emitters. Metal nodes, π‐conjugated linkers, guests, and confined water emerge as decisive handles for tuning charge transport ...
Pounraj Thanasekaran, Arif I. Inamdar, Muhammad Usman, Ming‐Hsi Chiang, Yen‐Hsiang Liu, Kuang‐Lieh Lu   +5 more
wiley   +1 more source

Synthesis, Characterization and ِAntimicrobial Activities of Some New Heterocyclic Schiff Bases Derived from Thiocarbohydrazide

Acta Chimica Slovenica, 2016
The reaction of prazolobenzothienopyrimidine-3-carbaldehyde 1 with thiocarbohydrazide afforded the Schiff’s base 3. The latter compound reacted with some electrophilic reagents to give 1,2,4-triazoles 4–6 and 1,2,4-triazines 7–9.
Kamelia El-mahdy, Azza El-Kazak, Mohamed Abdel-Megid, Magdy Seada, Osama Farouk   +4 more
doaj   +1 more source

Design, Synthesis, and Evaluation of Coumarin‐Rasagiline Hybrids as Multifunctional Neuroprotective Agents

ChemMedChem, Volume 21, Issue 10, 27 May 2026.
Novel coumarin‐rasagiline hybrid molecules were designed and synthesized as multifunctional agents targeting key pathological mechanisms of neurodegenerative diseases. These compounds exhibited hMAO‐B inhibitory activity, antioxidant and neuroprotective effects, supported by ADMET profiling and molecular modeling studies. The design of hybrid molecules
Aitor Carneiro, Sandra Barreiro, Claudia Sofia Machado, Miguel Pinto, Daniel Chavarria, Manuel Novás, Davide Crucitti, Carlos Fernandes, Maria João Matos   +8 more
wiley   +1 more source

Recent Approaches for the Synthesis of Pyridine and Quinoline Cores Present in Natural Products

Advanced Synthesis &Catalysis, Volume 368, Issue 10, 19 May 2026.
An anthology of the most recent methods used to synthesize pyridines and quinolines found in natural products over the last decade. Pyridines, quinolines, and their derivatives represent a class of significant heterocyclic compounds that are prevalent in a multitude of natural products, including alkaloids found in plants, fungi, insects, marine ...
Carl Bowman, Mathieu Frenette, Sylvain Canesi   +2 more
wiley   +1 more source

An intramolecular inverse electron demand Diels–Alder approach to annulated α-carbolines

Beilstein Journal of Organic Chemistry, 2012
Intramolecular inverse electron demand cycloadditions of isatin-derived 1,2,4-triazines with acetylenic dienophiles tethered by amidations or transesterifications proceed in excellent yields to produce lactam- or lactone-fused α-carbolines.
Zhiyuan Ma, Feng Ni, Grace H. C. Woo, Sie-Mun Lo, Philip M. Roveto, Scott E. Schaus, John K. Snyder   +6 more
doaj   +1 more source

Regioselective Tele‐Substitution of Aroyl Chlorides via Activation by an Al/P Frustrated Lewis Pair

ChemistryEurope, Volume 4, Issue 5, May 2026.
A tele‐substitution of aroyl chlorides with silyl ketene acetals is enabled by an ortho‐phenylene‐linked Al/P frustrated Lewis pair. Intramolecular aluminum activation polarizes the aroylphosphonium intermediate, promoting regioselective dearomative nucleophilic addition to the aromatic ring.
Hirotaka Okamoto, Yoshihiro Nishimoto, Makoto Yasuda   +2 more
wiley   +1 more source