A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 611-73-4, Name is 2-Oxo-2-phenylacetic acid, molecular formula is C8H6O3. In an article, author is Jahanshahi, Parivash,once mentioned of 611-73-4, Recommanded Product: 611-73-4.
A novel one-pot four-component, highly efficient and environmentally benign approach for the synthesis of a wide range of 1H-pyrazolo[1,2-b]phthalazine-5,10-dione derivatives in the presence of acetic acid functionalized imidazolium salt (1-carboxymethyl-2,3-dimethylimidazolium iodide {[cmdmim]I}) as a newly synthesized BrOnsted acid catalyst is described. The reaction occurs via tandem Knoevenagel-cyclocondensation of phthalic anhydride, hydrazine hydrate, aromatic aldehydes and 3-(1-methyl-1H-pyrrol-2-yl)-3-oxopropanenitrile (or 3-(1H-indol-3-yl)-3-oxopropanenitrile) in the presence of acetic acid functionalized imidazolium salt {[cmdmim]I} in ethanol under reflux conditions. This adequate procedure possesses some advantages like atom economy, cost-effectiveness, operational simplicity, short reaction times, straightforward work-up procedure, high yields, and reusability of the catalyst in 5 consecutive runs without any appreciable decrease in activity.
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Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem