Results 11 to 20 of about 96,191 (265)

Heterocyclic compounds and use thereof

[[abstract]]Heterocyclic compounds of Formula (I) shown herein. Also disclosed are pharmaceutical compositions containing the heterocyclic compounds and methods of using the heterocyclic compounds to mobilize hematopoietic stem cells and endothelial ...
Shia, KS;Chao, YS;Jan, JJ;Tsou, LK;Chen, CT
core   +10 more sources

Synthesis of Carboxymethyl Chitosan and Its Derivatives Using KI and/or Ultrasonication

Chemistry Proceedings, 2022
Chitosan is a natural polysaccharide that is mainly obtained from the shell of marine crustaceans including crabs, lobsters, shrimps, etc. Chitosan has been widely used in biomedicine due to its special characteristics of low toxicity, biocompatibility ...
Mahsa Rajabi, Mohammad Dohendou, Mohammad G. Dekamin   +2 more
doaj   +1 more source

Synthesis of New 1,3,5-Triazine-Based 2-Pyrazolines as Potential Anticancer Agents

Molecules, 2018
A new series of 1,3,5-triazine-containing 2-pyrazoline derivatives (8–11)a–g was synthesized by cyclocondensation reactions of [(4,6-bis((2-hydroxyethyl)amino)-1,3,5-triazin-2-yl)amine]chalcones 7a–g with hydrazine hydrate and ...
Leydi M. Moreno, Jairo Quiroga, Rodrigo Abonia, Jonathan Ramírez-Prada, Braulio Insuasty   +4 more
doaj   +1 more source

Chitosan-EDTA-Cellulose bio-based network: A recyclable multifunctional organocatalyst for green and expeditious synthesis of Hantzsch esters

Carbohydrate Polymer Technologies and Applications, 2023
The cellulose grafted to chitosan by ethylenediaminetetraacetic acid (Cs-EDTA-Cell) material was prepared and characterized by different spectroscopic, microscopic or analytical methods and techniques including Fourier transform infrared (FTIR) and ...
Negin Rostami, Mohammad G. Dekamin, Ehsan Valiey   +2 more
doaj   +1 more source

Design and characterization of an urea-bridged PMO supporting Cu(II) nanoparticles as highly efficient heterogeneous catalyst for synthesis of tetrazole derivatives

Scientific Reports, 2022
In this work, a new periodic mesoporous organosilica with urea-bridges produced by the reaction of (3-aminopropyl)triethoxysilane and toluene-2,4-diisocyanate (APS-TDU-PMO) is introduced.
Ehsan Valiey, Mohammad G. Dekamin
doaj   +1 more source

Fe3O4/SiO2 decorated trimesic acid-melamine nanocomposite: a reusable supramolecular organocatalyst for efficient multicomponent synthesis of imidazole derivatives

Scientific Reports, 2023
This article describes supramolecular Fe3O4/SiO2 decorated trimesic acid-melamine (Fe3O4/SiO2-TMA-Me) nanocomposite that can be prepared with features that combine properties of different materials to fabricate a structurally unique hybrid material.
Babak Fattahi, Mohammad G. Dekamin
doaj   +1 more source

Synthesis of New Oxindoles and Determination of Their Antibacterial Properties

Heteroatom Chemistry, 2020
A versatile method for the synthesis of new oxindoles was developed by the reaction between substituted isatins and 5-aminopyrazoles. The reaction was carried out at room temperature in ethanol using p-toluenesulfonic acid as the catalyst.
Pablo E. Romo, Braulio Insuasty, Rodrigo Abonia, María del Pilar Crespo, Jairo Quiroga   +4 more
doaj   +1 more source

Traceless Redox-Annulations of Alicyclic Amines

SynOpen, 2020
Amines such as 1,2,3,4-tetrahydroisoquinoline undergo redox­-neutral annulations with ortho-(nitromethyl)benzaldehyde. Benzoic­ acid acts as a promoter in these reactions, which involve concurrent amine α-C–H bond and N–H bond functionalization ...
Dillon R. L. Rickertsen, Longle Ma, Anirudra Paul, Khalil A. Abboud, Daniel Seidel   +4 more
doaj   +1 more source

Highly Efficient and Diastereoselective Synthesis of New Pyrazolylpyrrolizine and Pyrazolylpyrrolidine Derivates by a Three-Component Domino Process

Molecules, 2014
Diastereoselective reactions between 4-formylpyrazoles, N-substituted maleimides and glycine derivates led to new series of pyrazolyldipyrrolo [3,4-a:3',4'-f]pyrrolizines and pyrazolylpyrrolo[3,4-c]pyrroles in good yields.
Jairo Quiroga, Jaime Gálvez, Rodrigo Abonia, Braulio Insuasty, Alejandro Ortíz, Justo Cobo, Manuel Nogueras   +6 more
doaj   +1 more source

Synthesis of Some Heterocyclic Compounds Using Cyanoacetohydrazide as Versatile Precursor

, 2022
This study reviewed the use of cyanoacetohydrazide as versatile precursor for synthesis of some heterocyclic compounds, as it contains five different functional groups ( cyano group, No. 1, active methylene group, No. 2, carbonyl group, No.
Marwa, Fouad, Yehia, Allam
core   +1 more source