Full paper/MémoireBrønsted acidic ionic liquid supported on rice husk ash (RHA-[pmim]HSO4): A highly efficient and reusable catalyst for the synthesis of 1-(benzothiazolylamino)phenylmethyl-2-naphthols

Add time:08/15/2019    Source:sciencedirect.com

In this work, rice husk ash (RHA), as a natural source of amorphous silica, was used as a support for the immobilization of 1-methyl-3-(trimethoxysilylpropyl)-imidazolium hydrogen sulfate. The immobilized acidic ionic liquid was characterized with a variety of techniques, including infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and pH analysis. This reagent showed excellent catalytic activity for the preparation of 1-(benzothiazolylamino)phenylmethyl-2-naphthols from the one-pot condensation of an aldehyde, 2-aminobenzothiazole and 2-naphthol, at 100 °C under solvent-free conditions. The procedure gave the products in excellent yields in very short reaction times with high TOF. Also, this catalyst can be reused six times without loss of its catalytic activity.

We also recommend Trading Suppliers and Manufacturers of 5-Hydroxy-1-(phenylmethyl)-2,4-imidazolindion (cas 110668-56-9). Pls Click Website Link as below: cas 110668-56-9 suppliers

Prev:1-Äthyl-2,3-dimethyl-cyclobutadien-eisentricarbonyl
Next:Pharmacological characterisation and inhibitory effects of (2R,3R,4S,5R)-2-(6-amino-2-{[(1S)-2-hydroxy-1-(phenylmethyl)ethyl]amino}-9H-purin-9-yl)-5-(2-ethyl-2H-tetrazol-5-yl)tetrahydro-3,4-furandiol, a novel ligand that demonstrates both adenosine A2A receptor agonist and adenosine A3 receptor antagonist activity)