Electric Literature of 1698-53-9, 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. 1698-53-9, Name is 4,5-Dichloro-2-phenylpyridazin-3(2H)-one, molecular formula is C10H6Cl2N2O. In a Article，once mentioned of 1698-53-9
Divergent C-H functionalization reactions (arylation, carboxylation, olefination, thiolation, acetoxylation, halogenation, naphthylation) using a pyridazinone moiety as an internal directing group were successfully established. This approach offers a late-stage, ortho-selective diversification of a biologically active pyridazinone scaffold. Seven series of novel pyridazinone analogues were synthesized conveniently as the synthetic precursors of potential sortase A (SrtA) inhibitors.
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Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N3102 – PubChem