In heterogeneous catalysis, the catalyst is in a different phase from the reactants. Recommanded Product: 6-Chloropyridazine-3-carboxylic acid, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 5096-73-1, name is 6-Chloropyridazine-3-carboxylic acid. In an article，Which mentioned a new discovery about 5096-73-1
Couplings between (hetero)aryl chlorides and phenols can be effectively promoted by CuI in combination with an N-aryl-N?-alkyl-substituted oxalamide ligand to proceed smoothly at 120 C. For this process, N-aryl-N?-alkyl-substituted oxalamides are more effective ligands than bis(N-aryl)-substituted oxalamides. A wide range of electron-rich and electron-poor aryl and heteroaryl chlorides gave the corresponding coupling products in good yields. Satisfactory conversions were achieved with electron-rich phenols as well as a limited range of electron-poor phenols. Catalyst and ligand loadings as low as 1.5 mol % are sufficient for the scaled-up variants of some of these reactions. Aryl and alkyl: N-Aryl-N?-alkyl-substituted oxalamide ligands promote the CuI catalyzed coupling of (hetero)aryl chlorides and phenols at 120 C more effectively than bis(N-aryl)-substituted oxalamides. A wide range of electron-rich and electron-poor aryl and heteroaryl chlorides were converted into the corresponding coupling products in good yields.
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Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N2048 – PubChem