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Preparation and characterization of hexamethylenetetramine‐functionalized magnetic nanoparticles and their application as novel catalyst for the synthesis of pyranopyrazole derivatives
Author(s) -
GhorbaniVaghei Ramin,
Izadkhah Vida
Publication year - 2018
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.4025
Subject(s) - hexamethylenetetramine , triethoxysilane , chemistry , catalysis , silanol , thermogravimetric analysis , magnetic nanoparticles , nanoparticle , scanning electron microscope , yield (engineering) , nuclear chemistry , chemical engineering , organic chemistry , materials science , metallurgy , engineering , composite material
A new magnetic catalyst was prepared through the reaction of silanol groups, on the surface of silica‐coated Fe 3 O 4 magnetic nanoparticles, with (3‐chloropropyl)triethoxysilane followed by hexamethylenetetramine and chlorosulfonic acid. The obtained magnetic catalyst was characterized using thermogravimetric analysis, vibrating sample magnetometry, scanning electron microscopy and energy‐dispersive X‐ray analysis. Its catalytic activity was investigated in the synthesis of pyranopyrazole compounds, and the results were excellent regarding high yield of the products and short reaction time.