crystallography. The palladacycles showed high catalytic efficiency toward activated and nonactivated aryl bromides (at room temperature) as well as aryl chlorides (at 80 °C) in Suzuki–Miyaura cross-coupling reactions. In addition, coupling reactions of aryl chlorides using potassium aryl trifluoroborates instead of phenyl boronic acid gave good-to-excellent product yields.
包含 C,N-供体和 N-杂环卡宾
配体的
叠氮-
钯环 [(C,NL)Pd(N3)(NHC)] [NHC = IPr; 1,3-双(2,6-二异丙基苯基)
咪唑-2-亚基],由 (i) IPr 和双核 PdII
叠氮化物 [Pd(μ-N3)(C,N-Ln)]2 [C, N-L1H = N,N'-二甲基
苄胺;C,N-
L2H = 2-(2'-
噻吩基)
吡啶;C,N-L3H =
偶氮苯;C,N-L4H = 2-(
对甲苯基)
吡啶],或来自 (ii) NaN3 和单核 PdII
氯化物,[Pd(Cl)(IPr)(C,N-Ln)],在
水溶液中。其中两种产物的结构是通过 X 射线晶体学确定的。在 Suzuki-Miyaura 交叉偶联反应中,
钯环对活化和未活化的芳基
溴化物(室温)以及芳基
氯化物(80°C)显示出高催化效率。此外,