TY - EJOUR
AU - Mirjalili, Bi Bi Fatemeh
AU - Keihanfar, Mina
PY - 2024
DA - February
TI - Nano-SiO2/hexamethylenetetramine promoted synthesis of pyrano[2,3-c] pyrazoles under solvent-free conditions
T2 - Iranian Journal of Catalysis
L1 - https://oiccpress.com/iranian-journal-of-catalysis/article/nano-sio2-hexamethylenetetramine-promoted-synthesis-of-pyrano23-c-pyrazoles-under-solvent-free-conditions-2/
N2 - In this study, the nano-SiO2/hexamethylenetetramine as a new basic heterogeneous nanocatalyst was prepared and used for the synthesis of pyranopyrazole via the four-component reaction. Various aldehydes, hydrazine hydrate, ethyl acetoacetate and malononitrile were reacted at room temperature under solvent-free and grinding conditions. The morphology and structure of nano-catalyst were investigated by techniques such as FT-IR spectroscopy, FESEM, TEM, XRD, CHNS elemental analyzer and TGA. The structure of pyranopyrazoles was determined by spectroscopic data of FTIR and NMR. The principal affairs of this procedure are easy work-up, high yields, mild conditions and short reaction times.
PB - OICC Press
KW - Pyrano[2, Reusable catalyst., 3-c]pyrazole, Nano-SiO2/hexamethylenetetramine, Multicomponent reactions, Basic nanocatalyst 
EN -