Results 11 to 20 of about 23,538 (226)

Biosynthesis of oxygen and nitrogen-containing heterocycles in polyketides [PDF]

open access: yesBeilstein Journal of Organic Chemistry, 2016
This review highlights the biosynthesis of heterocycles in polyketide natural products with a focus on oxygen and nitrogen-containing heterocycles with ring sizes between 3 and 6 atoms.
Franziska Hemmerling, Frank Hahn
doaj   +3 more sources

RETRACTED: Ullah et al. Fluorescent and Phosphorescent Nitrogen-Containing Heterocycles and Crown Ethers: Biological and Pharmaceutical Applications. Molecules 2022, 27, 6631 [PDF]

open access: yesMolecules
The journal retracts the article titled “Fluorescent and Phosphorescent Nitrogen-Containing Heterocycles and Crown Ethers: Biological and Pharmaceutical Applications” [...]
Faiz Ullah   +8 more
doaj   +2 more sources

Preparation of Antimicrobial Nitrogen Heterocycles Using Sustainable Processes

open access: yesProceedings, 2017
Libraries of compounds containing heteroaromatic rings and other nitrogen heterocycles were [...]
Concepción C. González   +4 more
doaj   +2 more sources

Benefits and applications of microwave-assisted synthesis of nitrogen containing heterocycles in medicinal chemistry [PDF]

open access: yesRSC Adv, 2020
Nitrogen containing heterocycles are of immense research interest because they are often found as naturally occurring bioactive compounds. The prominence of N-heterocycles makes it vital to develop methods to increase their synthetic efficiencies and ...
Cravotto, G.   +7 more
core   +2 more sources

Highly Efficient and Reusable Copper-Catalyzed N-Arylation of Nitrogen-Containing Heterocycles with Aryl Halides

open access: yesMolecules, 2009
CuO/AB was found to be a simple and efficient catalyst for the N-arylation of a variety of nitrogen-containing heterocycles, giving the products in excellent yields.
Kang Hyun Park   +6 more
doaj   +2 more sources

Synthesis of Nitrogen Heterocycles Using Samarium(II) Iodide

open access: yesMolecules, 2017
Nitrogen heterocycles represent vital structural motifs in biologically-active natural products and pharmaceuticals. As a result, the development of new, convenient and more efficient processes to N-heterocycles is of great interest to synthetic chemists.
Shicheng Shi, Michal Szostak
doaj   +2 more sources

A Greener and Efficient Method for Nucleophilic Aromatic Substitution of Nitrogen-Containing Fused Heterocycles

open access: yesMolecules, 2018
A simple and efficient methodology for the nucleophilic aromatic substitution of nitrogen-containing fused heterocycles with interesting biological activities has been developed in an environmentally sound manner using polyethylene glycol (PEG-400) as ...
Joana F. Campos   +3 more
doaj   +2 more sources

Monofluorinated Nitrogen Containing Heterocycles: Synthesis, Characterization and Fluorine Effect [PDF]

open access: yes, 2020
A straight forward synthesis and efficient introduction of fluoromethyl group in nitrogen heterocycles is reported. Starting from the respective NH heterocycles fluoromethylation is performed with fluoroiodomethane and proceeds under mild reaction ...
Reichel, Marco   +3 more
core   +1 more source

Oxidative allene amination for the synthesis of nitrogen-containing heterocycles [PDF]

open access: yesARKIVOC, 2018
Josephine Eshon   +2 more
doaj   +2 more sources

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