The heterocycle-containing diarylmethane synthesis from chloromethyl(hetero)arenes with (hetero)arylboron reagents was attained using the palladium/ether-imidazolium chloride system. This coupling process tolerated a diverse range of heteroaromatic moieties with sufficient catalytic activity to achieve the efficient synthesis of various diheteroarylmethanes in good to excellent yields.
Efficient Pd-Catalyzed Heterobenzylic Cross-Coupling Using Sulfonium Salts as Substrates and (PhO)<sub>3</sub>P as a Supporting Ligand
作者:Shijie Zhang、Daniel Marshall、Lanny S. Liebeskind
DOI:10.1021/jo982250s
日期:1999.4.1
participate in palladium-catalyzedStillecross-couplings with organostannanes. All but the last mentioned sulfonium salt are also active participants in palladium-catalyzedcross-couplingreactions with boronic acids and organozinc halides. Because the heterobenzylic cross-coupling reactants are potent alkylating agents, they scavenge the typical phosphines and arsines that otherwise could be used to stabilize