A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, COA of Formula: https://www.ambeed.com/products/143-66-8.html, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 143-66-8, Name is Sodium tetraphenylborate, molecular formula is C24H20BNa. In an article, author is Elmi-Mehr, Maryam,once mentioned of 143-66-8.
AN EFFICIENT ONE-POT NEAT SYNTHESIS OF PYRAZOLO[1,2-b]PHTHALAZINES USING CELLULOSE SULFURIC ACID AS A BIODEGRADABLE AND RECOVERABLE HETEROGENEOUS CATALYST
An efficient and environmentally friendly procedure for the synthesis of 3-amino-1-aryl-5, 10-dioxo-5,10-dihydro-1H-pyrazolo[1,2-b] phthalazine-2-carbonitriles through the one-pot, three-component reaction of phthalhydrazide, an aromatic aldehyde, and malononitrile in the presence of cellulose sulfuric acid (cellulose-SO3H) is described. The reactions occur under thermal solvent-free conditions and the process is operative with various aromatic aldehydes, giving the corresponding products in high yields. Other beneficial features of this protocol include inexpensive, biodegradable and easily obtained catalyst, avoiding the use of harmful organic solvents, simple work-up, and the recyclability and reusability of the catalyst for up to five consecutive runs.
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Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem