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TheNovelAndHighly Efficient P,OChelated Pd(II)Complexes Catalyzed SuzukiCross-CouplingReactionAtRoomTemperature

Mengping Guo, Fangfang Jian, Ren He

A novel class of air- and moisture- stable P, O chelated Pd(ll) complexes, found to be highly efficient catalysts for Suzuki reaction with generally low Pdcatalyst loading(0.01%) and low temperature, were synthesized and characterized by 1H-NMR, 31P-NMR, IR and single crystal X-ray. The crystal structures confirm that the Pd atom adopts a square-planar geometry with the PdO2P2 chromophore. Above complexes are all shown to catalyze the Suzuki-Miyaura coupling reaction of aryl boronic acids and aryl halides within aqueous solvents in good yield.