Recent progress in transition metal-free C-heteroatom bond formation by functionalization of CH bond in imidazole-fused heterocycles

X Xu, D Chen, Z Wang - Chinese Journal of Organic Chemistry, 2019 - sioc-journal.cn
Recently, the direct incorporation of heteroatom into imidazole-fused heterocycles through
transition metal-free CH functionalization has rapidly been advanced and become an eco …

Cholesterol-based compounds: recent advances in synthesis and applications

HMT Albuquerque, CMM Santos, AMS Silva - Molecules, 2018 - mdpi.com
This review reports on the latest developments (since 2014) in the chemistry of cholesterol
and its applications in different research fields. These applications range from drug delivery …

Regioselective, Solvent‐ and Metal‐Free Chalcogenation of Imidazo[1,2‐a]pyridines by Employing I2/DMSO as the Catalytic Oxidation System

J Rafique, S Saba, AR Rosario… - Chemistry–A European …, 2016 - Wiley Online Library
Highly efficient molecular‐iodine‐catalyzed chalcogenations (S and Se) of imidazo [1, 2‐a]
pyridines were achieved by using diorganoyl dichalcogenides under solvent‐free …

Direct, Metal‐free C(sp2)−H Chalcogenation of Indoles and Imidazopyridines with Dichalcogenides Catalysed by KIO3

J Rafique, S Saba, MS Franco… - … A European Journal, 2018 - Wiley Online Library
Herein, we report a greener protocol for the synthesis of 3‐Se/S‐indoles and imidazo [1, 2‐
a] pyridines through direct C (sp2)− H bond chalcogenation of heteroarenes with half molar …

DMSO/iodine-catalyzed oxidative C–Se/C–S bond formation: a regioselective synthesis of unsymmetrical chalcogenides with nitrogen-or oxygen-containing arenes

S Saba, J Rafique, AL Braga - Catalysis Science & Technology, 2016 - pubs.rsc.org
A convenient metal-free and solvent-free iodine-catalyzed regioselective greener protocol to
access different types of unsymmetrical chalcogenides with nitrogen-or oxygen-containing …

[HTML][HTML] Synthesis and evaluation of dihydropyrimidinone-derived selenoesters as multi-targeted directed compounds against Alzheimer's disease

FAR Barbosa, RFS Canto, S Saba, J Rafique… - Bioorganic & Medicinal …, 2016 - Elsevier
This paper describes the synthesis and evaluation of new dihydropyrimidinone (DHPM)-
derived selenoesters as potential multi-targeted agents for the treatment of Alzheimer's …

insitu Formation of RSCl/ArSeCl and Their Oxidative Coupling with Enaminone Derivatives Under Transition‐metal Free Conditions

Z Shang, Q Chen, L Xing, Y Zhang… - Advanced Synthesis & …, 2019 - Wiley Online Library
The reaction of diorganyl disulfides or diselenides with PhICl2 in DMF at room temperature
led to the in situ formation of the reactive organosulfenyl chloride (RSCl) or selenenyl …

Copper-Catalyzed Synthesis of Unsymmetrical Diorganyl Chalcogenides (Te/Se/S) from Boronic Acids under Solvent-Free Conditions

S Saba, GV Botteselle, M Godoi, TEA Frizon, FZ Galetto… - Molecules, 2017 - mdpi.com
The efficient and mild copper-catalyzed synthesis of unsymmetrical diorganyl chalcogenides
under ligand-and solvent-free conditions is described. The cross-coupling reaction was …

ESIPT-based benzazole-pyromellitic diimide derivatives. A thermal, electrochemical, and photochemical investigation

TEA Frizon, CAM Salla, F Grillo… - … Acta Part A: Molecular …, 2023 - Elsevier
This study describes the synthesis of new pyromellitic diimide (PMDI) derivatives obtained in
good yields from the reaction between pyromellitic dianhydride and aminobenzazoles …

Metal- and Solvent-Free Approach to Access 3-Se/S-Chromones from the Cyclization of Enaminones in the Presence of Dichalcogenides Catalyzed by KIO3

J Rafique, S Saba, AR Schneider, MS Franco… - ACS …, 2017 - ACS Publications
Herein, we describe a greener protocol for the one-pot synthesis of 3-Se/S-4 H-chromen-4-
ones. The desired products were obtained in good to excellent yields using 2-hydroxyphenyl …