Results 51 to 60 of about 195,223 (291)

1,n-Diamines. Part 2: Synthesis of acyclic and heterocyclic N-arylputrescine derivatives

, 2011
In the present Letter we report the use of N-arylputrescines as synthetic intermediates for the preparation of N-acyl-N′-aryltetramethylenediamines 3 and related seven-membered heterocyclic amidines 4.
Jimena E Díaz, Juan A. Bisceglia, María C Mollo, L. Orelli   +3 more
semanticscholar   +1 more source

Covalent Organic Frameworks for Photocatalytic CO2 Reduction: Metal Integration Principles, Strategies and Functions

Advanced Functional Materials, EarlyView.
Covalent organic frameworks (COFs) with metals have been recognized as versatile platforms for photocatalytic CO2 reduction (CO2PRR). Herein, an overview of metal integration strategies for COFs is systematically summarized. Regulatory mechanisms and structure–activity relationships between metal integration and COF‐based CO2PRR are emphasized.
Jie He, Minxian Zhang, Jinqiang Zhang, Hongqi Sun, Shaobin Wang, Xiaoguang Duan   +5 more
wiley   +1 more source

Overview on the chemistry of 1-(4-substituted aminophenyl) ethanones Part(I)

To Chemistry Journal, 2020
This review presents a systematic and comprehensive survey of the method of preparation and the chemical reactivity of 1-(4-substituted-aminophenyl) ethanones.
MOUSTAFA Gouda, Mohamed Helal, Ahmed Ragab, Ghada G. El-Bana, Mohammed Salem   +4 more
doaj  

Synthesis of Novel N-Heterocyclic Compounds Containing 1,2,3-Triazole Ring System via Domino, “Click” and RDA Reactions

Molecules, 2019
An uncomplicated, high-yielding synthetic route has been developed to constitute complicated heterocycles, applying domino, click and retro-Diels⁻Alder (RDA) reaction sequences.
Márta Palkó, Mohamed El Haimer, Zsanett Kormányos, Ferenc Fülöp   +3 more
doaj   +1 more source

Synthesis and Diuretic Activity of Substituted 1,3,4-Thiadiazoles

Scientifica, 2022
1,3,4-Thiadiazole nuclease, a 5-membered heterocyclic ring system containing two nitrogen and one sulfur atoms in addition to carbon atoms, is compound that showed promising results in the process of searching new diuretic agents. In this study, seven 5-
Asrat Ergena, Yerra Rajeshwar, Gebremedhin Solomon   +2 more
doaj   +1 more source

Bio‐Inspired Molecular Events in Poly(Ionic Liquids)

Advanced Functional Materials, EarlyView.
Originating from dipolar and polar inter‐ and intra‐chain interactions of the building blocks, the topologies and morphologies of poly(ionic liquids) (PIL) govern their nano‐ and micro‐processibility. Modulating the interactions of cation‐anion pairs with aliphatic dipolar components enables the tunability of properties, facilitated by “bottom‐up ...
Jiahui Liu, Marek W. Urban
wiley   +1 more source

Synthesis, Identification and Biological Activity of New Heterocyclic Compounds from Reaction of New Schiff-Bases with Phathalic Anhydride

Science Journal of University of Zakho, 2020
Series of new Schiff bases and their derivatives (Oxazepine) have been synthesized during two steps. The first step synthesis of imines derivatives (1-10) by the condensation reaction of 1, 7-diaminohepatane and 1,8-diaminooctane with different ...
Alya A. Dawood, Shireen R. Mmohammed, Mohammed Mahmoud   +2 more
doaj   +1 more source

Aquatic hazard assessment of a commercial sample of naphthenic acids.

Chemosphere, 2015
This paper presents chemical composition and aquatic toxicity characteristics of a commercial sample of naphthenic acids (NAs). Naphthenic acids are derived from the refining of petroleum middle distillates and can contribute to refinery effluent ...
J. Swigert, Carol Lee, D. Wong, Russell White, A. Scarlett, C. West, S. Rowland   +6 more
semanticscholar   +1 more source

Electrocatalytic Reduction of CO2 to Ethylene: Catalyst Design and Synchrotron‐Based Characterizations

Advanced Functional Materials, EarlyView.
This review evaluates strategies for electrochemical CO2 reduction to ethylene, focusing on copper‐based catalyst design and microenvironment modulation to achieve industrial‐grade performance. By leveraging operando synchrotron‐based characterizations, we provide a multiscale understanding of dynamic structural transformations and key reaction ...
Meng Zhang, Zuolong Chen, Yimin A. Wu
wiley   +1 more source

Imidazole Hybrids: A Privileged Class of Heterocycles in Medicinal Chemistry with New Insights into Anticancer Activity

Molecules
Imidazole is a five-membered heterocyclic system featuring two nitrogen heteroatoms at the 1- and 3-positions of the ring. The imidazole scaffold is particularly suited for kinase inhibition concepts.
Zarifa Murtazaeva, Azizbek Nasrullaev, Anvarjon Buronov, Shukhrat Gaybullaev, Lifei Nie, Sodik Numonov, Zohidjon Khushnazarov, Davron Turgunov, Rustamkhon Kuryazov, Jiangyu Zhao, Khurshed Bozorov   +10 more
doaj   +1 more source