Results 21 to 30 of about 1,403,091 (264)

Recent Advances in N-Heterocyclic Small Molecules for Synthesis and Application in Direct Fluorescence Cell Imaging

open access: yesMolecules, 2023
Nitrogen-containing heterocycles are ubiquitous in natural products and drugs. Various organic small molecules with nitrogen-containing heterocycles, such as nitrogen-containing boron compounds, cyanine, pyridine derivatives, indole derivatives ...
Yanan Li, Tao Liu, Jianan Sun
doaj   +1 more source

A Review on Recent Advances in Nitrogen-Containing Molecules and Their Biological Applications

open access: yesMolecules, 2020
The analogs of nitrogen-based heterocycles occupy an exclusive position as a valuable source of therapeutic agents in medicinal chemistry. More than 75% of drugs approved by the FDA and currently available in the market are nitrogen-containing ...
Nagaraju Kerru   +4 more
doaj   +1 more source

Recent advances in metal catalyst- and oxidant-free electrochemical C-H bond functionalization of nitrogen-containing heterocycles

open access: yesFrontiers in Chemistry, 2022
The C-H functionalization of nitrogen-containing heterocycles has emerged as a powerful strategy for the construction of carbon-carbon (C-C) and carbon-heteroatom (C-X) bonds.
Ya-Nan Li   +4 more
doaj   +1 more source

The Role of Five-Membered Heterocycles in the Molecular Structure of Antibacterial Drugs Used in Therapy

open access: yesPharmaceutics, 2023
Five-membered heterocycles are essential structural components in various antibacterial drugs; the physicochemical properties of a five-membered heterocycle can play a crucial role in determining the biological activity of an antibacterial drug.
Aura Rusu   +3 more
doaj   +1 more source

Green Synthesis of Aromatic Nitrogen-Containing Heterocycles by Catalytic and Non-Traditional Activation Methods

open access: yesMolecules, 2023
Recent advances in the environmentally benign synthesis of aromatic N-heterocycles are reviewed, focusing primarily on the application of catalytic methods and non-traditional activation.
R. B. Vlocskó, Guoshu Xie, B. Török
semanticscholar   +1 more source

Fused 1,5-Naphthyridines: Synthetic Tools and Applications

open access: yesMolecules, 2020
Heterocyclic nitrogen compounds, including fused 1,5-naphthyridines, have versatile applications in the fields of synthetic organic chemistry and play an important role in the field of medicinal chemistry, as many of them have a wide range of biological ...
Carme Masdeu   +6 more
doaj   +1 more source

Synthesis of α‐Trifluoromethylated Nitrogen Heterocycles. [PDF]

open access: yesChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Ségolène, Gille   +3 more
openaire   +2 more sources

Insertion of ammonia into alkenes to build aromatic N-heterocycles

open access: yesNature Communications, 2022
Aromatic heterocycles containing nitrogen are ubiquitous in biologically relevant small molecules. Here the authors show an unorthodox methodology for their synthesis, by inserting the nitrogen atom into a carbon ring, with ammonia in electrochemical ...
Shuai Liu, Xu Cheng
doaj   +1 more source

The Nitrogen Heterocycle Content of Meteorites and Their Significance for the Origin of Life

open access: yesLife, 2018
Carbonaceous chondrites are very primitive meteorites that are rich in carbon. They contain many soluble organic compounds, including nitrogen heterocycles.
Zita Martins
doaj   +1 more source

Synthesis of arylamines and N-heterocycles by direct catalytic nitrogenation using N2

open access: yesNature Communications, 2021
Ammonia and nitric acid are key platform chemicals to introduce nitrogen into organic molecules, however gaseous N2 would be a more direct and available source of nitrogen.
Kai Wang   +5 more
doaj   +1 more source

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