Results 11 to 20 of about 40,209 (198)

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

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

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

Cycvalone in the synthesis of nitrogen-, oxygen-containing heterocycles [PDF]

open access: yesИзвестия Саратовского университета. Новая серия: Серия Химия. Биология. Экология, 2023
Cycvalone is an analogue of curcumin (EE conformation), exhibits a wide range of biological activity (antioxidant, hepatoprotective, membrane stabilizing, anti-ulcer) and is used in medical practice as a choleretic.
Rogov, Danila A.   +1 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

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

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

An electron-deficient triosmium cluster containing the thianthrene ligand: Synthesis, structure and reactivity of [Os₃(CO)₉(μ3-η2-C₁₂H₇S₂)(μ-H)] [PDF]

open access: yes, 2008
Reaction of [Os₃(CO)₁₀(CH₃CN)₂] with thianthrene at 80 °C leads to the nonacarbonyl dihydride compound [Os₃(CO)₉(μ-3,4-η²-C₁₂H₆S₂)(μ-H)₂] (1) and the 46-electron monohydride compound [Os₃(CO)₉(μ₃-η²-C₁₂H₇S₂)(μ-H)] (2).
Hassan, Mohammad R.   +7 more
core   +1 more source

Synthesis and Reactivity of 3H-1,2-dithiole-3-thiones

open access: yesMolecules, 2021
3H-1,2-Dithiole-3-thiones are among the best studied classes of polysulfur-containing heterocycles due to the almost explosive recent interest in these compounds as sources of hydrogen sulfide as an endogenously produced gaseous signaling molecule.
Oleg A. Rakitin
doaj   +1 more source

Development of covalent triazine frameworks as heterogeneous catalytic supports [PDF]

open access: yes, 2019
Covalent triazine frameworks (CTFs) are established as an emerging class of porous organic polymers with remarkable features such as large surface area and permanent porosity, high thermal and chemical stability, and convenient functionalization that ...
Krishnaraj, Chidharth   +3 more
core   +1 more source

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   +1 more source

Home - About - Disclaimer - Privacy