%0 Journal Article %T New pyrazolone derivatives synthesis: comparison of the catalytic effect of three typically different Brønsted acid catalysts on the reaction progression %J Iranian chemical communication %I %Z 2423-4958 %A Chehardoli, Gholamabbas %A Mansouri, Navid %D 2019 %\ 01/01/2019 %V 7 %N Issue 1, pp. 1-89, Serial No. 22 %P 52-62 %! New pyrazolone derivatives synthesis: comparison of the catalytic effect of three typically different Brønsted acid catalysts on the reaction progression %K Pyrazolone %K silica sulfuric acid %K tetra-n-butyl ammonium hydrogen sulfate %K [2 %K 2′-bipyridine]-1 %K 1′-diium tri-cyanomethanide %R 10.30473/icc.2018.4937 %X Via the one-pot condensation reaction of ethyl acetoacetate, aromatic aldehydes, 2,4-dinitrophenylhydrazine, and β-naphthol; new pyrazolone derivatives were synthesized in the presence of three Brønsted acid catalysts. These Brønsted acid catalysts are Silica sulfuric acid (SSA), tetra-n-butyl ammonium hydrogen sulfate (TBAHSO4) and [2,2′-Bipyridine]-1,1′-diium tricyanomethanide {[2,2′-BPyH][C(CN)3]2}. Each of these combinations has its own characteristics. SSA is a heterogeneous catalyst. TBAHSO4 is a phase transfer catalyst and {[2,2′-BPyH][C(CN)3]2} is an ionic liquid. We compared the obtained results of these catalysts. In most cases, the results were comparable. But, sometimes TBAHSO4 and {[2,2′-BPyH][C(CN)3]2} give the better results to the SSA in term of reaction time and yields. Even though, isolation of SSA from products was easier than the separation of two other catalysts. %U https://icc.journals.pnu.ac.ir/article_4937_77b53189830f19dff47fea9e85aaa117.pdf