RSC Advances, ( ISI ), Volume (4), No (105), Year (2014-10) , Pages (61193-61199)

Title : ( Cellulose sulfuric acid as a bio-supported and efficient solid acid catalyst for synthesis of pyrazoles in aqueous medium )

Authors: Mohammad Ali Nasseri , Mehri Salim , Abbas Ali Esmaeili ,

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A convenient and practical method was described for the regioselective synthesis of pyrazoles from hydrazines/hydrazides and 1,3-dicarbonyl compoundsvia the Knorr synthesis in water with cellulose sulfuric acid (CSA) as a biopolymer-based solid acid catalyst. Various hydrazines and hydrazides were reacted with 1,3 diketones and the desired pyrazoles were obtained in high yields. The reaction of less reactive hydrazines with 1,3-dicarbonyl compounds stopped at the corresponding hydrazone derivatives. Hydrazides were employed withb-ketoester, and imine adducts were the only isolated product. Simple isolation of products, mild reaction conditions, reusability of solid acid catalysts and short reaction times are advantages of this green procedure.

Keywords

, sulfuric acid, biopolymer-based solid acid catalyst,
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@article{paperid:1044398,
author = {Mohammad Ali Nasseri and Mehri Salim and Esmaeili, Abbas Ali},
title = {Cellulose sulfuric acid as a bio-supported and efficient solid acid catalyst for synthesis of pyrazoles in aqueous medium},
journal = {RSC Advances},
year = {2014},
volume = {4},
number = {105},
month = {October},
issn = {2046-2069},
pages = {61193--61199},
numpages = {6},
keywords = {sulfuric acid; biopolymer-based solid acid catalyst; pyrazoles},
}

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%0 Journal Article
%T Cellulose sulfuric acid as a bio-supported and efficient solid acid catalyst for synthesis of pyrazoles in aqueous medium
%A Mohammad Ali Nasseri
%A Mehri Salim
%A Esmaeili, Abbas Ali
%J RSC Advances
%@ 2046-2069
%D 2014

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