Title of article :
Synthesis of 4,4-(arylmethylene)bis(1H-pyrazol-5-ols) via multi-component reactions by using silica-bonded sulfamic acid derivatives
Author/Authors :
Tayebi, Shekoofeh islamic azad university, ايران , Niknam, Khodabakhsh persian gulf university, بوشهر, ايران
Abstract :
The one-pot, multi-component synthesis of 4,4-(arylmethylene)bis(1H-pyrazol-5-ols) by tandem Knoevenagel-Michael reaction of phenylhydrazine, ethyl acetoacetate and aldehydes in the presence of silica-bonded N-propylpiperazine sulfamic acid (SBPPSA) as a recyclable solid acid catalyst was reported. SBPPSA showed much the same efficiency when used in consecutive reaction runs
Keywords :
Silica , bonded N , propylpiperazine sulfamic acid , Catalyst , 4 , 4 , (Arylmethylene)bis(1H , pyrazol , 5 , ols) , Aldehydes , Multi , component reactions ,
Journal title :
Iranian Journal of Catalysis
Journal title :
Iranian Journal of Catalysis
