Results 131 to 140 of about 23,082 (272)

Synthesis of Nitrogen Heterocycles from Ynamides and Enamides

, 2020
This thesis has mainly focused on the development of new methods towards the synthesis of highly valuable nitrogen-containing heterocycles starting from either ynamides or their relative enamides, in which a radical-mediated intramolecular cyclization of
Zhang, Chunyang
core  

Polycyclic nitrogen heterocycles as potential thymidine phosphorylase inhibitors: synthesis, biological evaluation, and molecular docking study. [PDF]

J Enzyme Inhib Med Chem, 2022
Aknin K, Bontemps A, Farce A, Merlet E, Belmont P, Helissey P, Chavatte P, Sari MA, Giorgi-Renault S, Desbène-Finck S.   +9 more
europepmc   +1 more source

Nitrogen NMR studies on some fused ring N-heterocycles

, 1989
^(15)N and^(14)N NMR data are reported for a number of fused ring N-heterocycles.^(14)N line widths,^(15)N-^1H couplings and nitrogen shielding additivity rales are used for^(15)N signal assignments.
Witanowski, M., Webb, G. A., Roberts, J. D., Stefaniak, L., Mahmoud, U.   +4 more
core  

Copper catalyzed late-stage C(sp³)-H functionalization of nitrogen heterocycles. [PDF]

Nat Commun, 2021
Chang Z, Huang J, Wang S, Chen G, Zhao H, Wang R, Zhao D.   +6 more
europepmc   +1 more source

The Role of Flow Chemistry on the Synthesis of Pyrazoles, Pyrazolines and Pyrazole-Fused Scaffolds

Molecules
Nitrogen-containing heterocycles are fundamental scaffolds in organic chemistry, particularly due to their prevalence in pharmaceuticals, agrochemicals and materials science.
Catarina M. Correia, Artur M. S. Silva, Vera L. M. Silva   +2 more
doaj   +1 more source

QSAR and Pharmacophore Modeling of Nitrogen Heterocycles as Potent Human N-Myristoyltransferase (Hs-NMT) Inhibitors. [PDF]

Molecules, 2021
Zaki MEA, Al-Hussain SA, Masand VH, Akasapu S, Lewaa I.   +4 more
europepmc   +1 more source

Visible‐Light‐Induced Hydrogen Generation from Mixtures of Hydrogen Boride Nanosheets and Phenanthroline Molecules

Advanced Science
Hydrogen boride (HB) nanosheets are recognized as a safe and lightweight hydrogen carrier, yet their hydrogen (H2) generation technique has been limited.
Jumpei Takeshita, Hayato Tsurugi, Andi Mauliana, Akira Yamaguchi, Takahiro Kondo, Masahiro Miyauchi   +5 more
doaj   +1 more source

Silver Benzoate Facilitates the Copper-Catalyzed C-N Coupling of Iodoazoles with Aromatic Nitrogen Heterocycles. [PDF]

ACS Omega, 2021
Lozano C, Ramirez C, Sin N, Viart HM, Prusiner SB, Paras NA, Conrad J.   +6 more
europepmc   +1 more source

Regioselective hydroamination of unactivated olefins with diazirines as a diversifiable nitrogen source

Nature Communications
Nitrogen-containing compounds, such as amines, hydrazines, and heterocycles, play an indispensable role in medicine, agriculture, and materials. Alkylated derivatives of these compounds, especially in sterically congested environments, remain a challenge
Qingyu Xing, Preeti P. Chandrachud, Khalilia Tillett, Justin M. Lopchuk   +3 more
doaj   +1 more source

Six-membered nitrogen heterocycles - aromaticity and electron delocalization

, 2005
All six membered nitrogen heterocycles are generally considered as delocalized systems with high extent of aromaticity. However, in our investigations we observed that the heterocycles bearing the azine grouping C=N-N=C (1,2,4-triazines and ...
Ludvík, Jiří
core