Product Details of 894086-00-1. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: 5-(di-tert-Butylphosphino)-1′,3′,5′-triphenyl-1’H-1,4′-bipyrazole, is researched, Molecular C32H35N4P, CAS is 894086-00-1, about Regioselective palladium-catalyzed C-H arylation of 4-alkoxy and 4-thioalkyl pyrazoles. Author is Vernier, William F.; Gomez, Laurent.
Alkoxy- and alkylthiopyrazoles such as 4-benzyloxy-1-methylpyrazole underwent regioselective arylation with aryl and heteroaryl bromides in the presence of Pd(OAc)2 and either SPhos or QPhos in 1,4-dioxane at 70-90 °C to yield arylpyrazoles such as I and an arylimidazole in 19-88% yields; 1-methylpyrazole, 4-chloro-1-methylpyrazole, 1-phenyl-4-pyrazolecarboxaldehyde, and 1-methylimidazole also underwent arylation under similar conditions but required higher temperatures Bromoaralkyl pyrazolyl ethers and thioethers such as 4-(2-bromobenzyloxy)-1-methylpyrazole underwent intramol. arylation to yield fused pyrazoles such as pyrazoloisobenzopyran II in 34-93% yields.
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