A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, Application In Synthesis of (S)-2-(4-Aminobenzamido)pentanedioic acid, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 4271-30-1, Name is (S)-2-(4-Aminobenzamido)pentanedioic acid, molecular formula is C12H14N2O5. In an article, author is Shaterian, Hamid Reza,once mentioned of 4271-30-1.
An efficient synthesis of 2H-indazolo[2,1-b]phthalazine-1,6,11(13H)-trione derivatives from the four-component condensation of dimedone, arylaldehyde, hydrazine monohydrate, and phthalic anhydride using reusable ionic liquids, 2-pyrrolidonium hydrogensulfate, (4-sulfobutyl)tris(4-sulfophenyl)phosphonium hydrogensulfate and triphenyl(propyl-3-sulphonyl)phosphonium toluenesulfonate as acidic catalysts have been investigated. (C) 2012 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
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Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem