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A highly efficient palladium-catalyzed direct desulfitative arylation of azoles at C2-position has been developed using sodium arylsulfinates as aryl sources. Azoles including benzoxazoles, benzothiazoles, oxazoles, thiazoles, and 1,3,4-oxadiazoles reacted with sodium arylsulfinates smoothly to generate the corresponding products in good to excellent yields, and various substitution patterns were...
In this paper, a novel and highly efficient copper/palladium-catalyzed tandem intramolecular Ullman-type C–O(N) coupling reaction of 2-(gem-dibromovinyl)phenols(anilines) followed by an intermolecular arylation of azoles through C–H activation has been developed. In the presence of CuBr with Pd(PPh 3 ) 2 Cl 2 used as co-catalyst, and LiO t Bu as a base, the one-pot...
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