The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. 81-48-1, Name is 1-Hydroxy-4-(p-tolylamino)anthracene-9,10-dione, SMILES is O=C(C1=C2C=CC=C1)C3=C(NC4=CC=C(C)C=C4)C=CC(O)=C3C2=O, in an article , author is Lashkari, Mojtaba, once mentioned of 81-48-1, Formula: https://www.ambeed.com/products/81-48-1.html.
A simple synthesis of 1H-pyrazolo[1,2-b]phthalazine-5,10-dione derivatives via one-pot four-component condensation reaction of phthalimide, hydrazine monohydrate, aromatic aldehyde derivatives and malononitrile in the presence of a catalytic amount of zirconium tetrachloride (ZrCl4) as a mild and efficient Lewis acidic catalyst under thermal and solvent-free conditions with good yields and short reaction times is developed. This present methodology has notable benefits such as high efficiency, inexpensive and non-toxic catalyst, environmentally benign nature, solvent-free conditions and simplicity of operation.
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Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem