A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, Safety of 2,2-Diphenylacetic acid, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 117-34-0, Name is 2,2-Diphenylacetic acid, molecular formula is C14H12O2. In an article, author is Shaterian, Hamid Reza,once mentioned of 117-34-0.
ZnO nanoparticles as efficient and reusable catalyst for the synthesis of 2H-indazolo[2,1-b]phthalazine-triones from the one-pot, four-component reaction of arylaldehydes, hydrazine monohydrate, phthalic anhydride, dimedone under solvent-free conditions with short reaction times is described. The ZnO nanoparticles can be reused several times without significant loss of its catalytic activities.
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Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem