Aminocoumarins are found to be present in many natural products, pharmaceuticals, and
organic materials. These derivatives demonstrate numerous biological activities including …

Herein, we have developed a novel synthetic route for the synthesis of chromeno [4, 3-d]
pyrido [1, 2-a] pyrimidin-6-one derivatives 8a-q using an acid ionic liquid [CMMIM][BF4–] 4 …

In this, a three-component reaction for the preparation of novel tetrazolo [1, 5-a] pyrimidine-6-
carboxamide derivatives from N, N′-(sulfonylbis (1, 4-phenylene)) bis (3-oxobutanamide) …

Amorphous carbon-supported sulfonic acid (AC–SO3H) is known as a new-generation solid
catalyst with exceptional activity in organic synthesis. We report here the synthesis of …

A sulfonated poly-4-vinyl pyridinium (PVPy-IL-B-SO3H) containing an acidic
pyridinium/HSO3− ionic liquid moiety was prepared and used as a catalyst for the three …

The immobilization of metal ions on inorganic supports has garnered significant attention
due to its wide range of applications. These immobilized metal ions serve as catalysts for …

In this study, a novel hybrid nanostructure consisting of acid-decorated chitosan and
magnetic AlFeO3 nanoparticles was fabricated. The acid-decorated chitosan provided a …

Polyethyleneimine (PEI) has been reported to have good potential for the adsorption of
metal ions. In this work, PEI was covalently bound to NiFe2O4@ SiO2 nanoparticles to form …

Polyether sulfone sulfamic acid (PES-NHSO3H) was prepared by simple sulfonation of a
modified polyether sulfone. The number of acidic sites (SO3H) was determined to be 4.23 …

A magnetic organic-inorganic hybrid of Fe3O4@ SiO2-functionalized propylpiperazine-1, 4-
diium tungstate (A) nanoparticles with a spherical structure was prepared and completely …