Results 11 to 20 of about 1,413,381 (322)

Recent Advancements in Photocatalytic Synthesis of Five Membered Nitrogen Heterocycles and Their Derivatives [PDF]

open access: yesMolecules
Photocatalytic synthesis of heterocycles has emerged as a versatile strategy in organic synthesis. Among various heterocycles, five membered heterocycles such as pyrroles, indoles and their derivatives have great significance based on their ...
Zeeshan Haider   +2 more
doaj   +2 more sources

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   +9 more sources

Recent Discovery of Nitrogen Heterocycles from Marine-Derived Aspergillus Species [PDF]

open access: yesMarine Drugs
Nitrogen heterocycles have drawn considerable attention because of their structurally novel and significant biological activities. Marine-derived fungi, especially the Aspergillus species, possess unique metabolic pathways to produce secondary ...
Jueying Shi   +8 more
doaj   +2 more sources

N-tert-Butanesulfinyl imines in the asymmetric synthesis of nitrogen-containing heterocycles

open access: yesBeilstein Journal of Organic Chemistry, 2021
The synthesis of nitrogen-containing heterocycles, including natural alkaloids and other compounds presenting different types of biological activities have proved to be successful employing chiral sulfinyl imines derived from tert-butanesulfinamide ...
Joseane A. Mendes   +4 more
doaj   +2 more sources

Photoredox Radical/Polar Crossover Enables Construction of Saturated Nitrogen Heterocycles. [PDF]

open access: yesOrg Lett, 2019
Photoredox-mediated radical/polar crossover (RPC) processes offer new avenues for the synthesis of cyclic molecules. This process has been realized for the construction of medium-sized saturated nitrogen heterocycles.
Pantaine LRE   +4 more
europepmc   +2 more sources

Catalytic Asymmetric Synthesis of α-Arylpyrrolidines and Benzo-fused Nitrogen Heterocycles. [PDF]

open access: yesAngew Chem Int Ed Engl, 2019
Herein, we report a practical two-step synthetic route to α-arylpyrrolidines through Suzuki-Miyaura cross-coupling and enantioselective copper-catalyzed intramolecular hydroamination reactions.
Dai XJ, Engl OD, León T, Buchwald SL.
europepmc   +2 more sources

Recent advances in the application of ring-closing metathesis for the synthesis of unsaturated nitrogen heterocycles. [PDF]

open access: yesSynthesis (Stuttg), 2019
This short review summarizes recent advances relating to the application of ring-closing olefin-olefin and carbonyl-olefin metathesis reactions towards the synthesis of unsaturated five- and six-membered nitrogen heterocycles.
Groso EJ, Schindler CS.
europepmc   +2 more sources

Harnessing unprotected deactivated amines and arylglyoxals in the Ugi reaction for the synthesis of fused complex nitrogen heterocycles [PDF]

open access: yesBeilstein Journal of Organic Chemistry
Piperazines and diazepines are examples of nitrogen heterocycles present in many marketed drugs highlighting their importance in the discovery of novel bioactive compounds.
Javier Gómez-Ayuso   +5 more
doaj   +2 more sources

Synthesis and Applications of Nitrogen-Containing Heterocycles as Antiviral Agents

open access: yesMolecules, 2022
Viruses have been a long-term source of infectious diseases that can lead to large-scale infections and massive deaths. Especially with the recent highly contagious coronavirus (COVID-19), antiviral drugs were developed nonstop to deal with the emergence
Tuyen N. Tran, Maged Henary
doaj   +2 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

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