Highly efficient palladium precatalysts of homoscorpionate bispyrazolyl ligands for the more challenging Suzuki–Miyaura cross-coupling of aryl chlorides
作者:Alex John、Mobin M. Shaikh、Ray J. Butcher、Prasenjit Ghosh
DOI:10.1039/c003174g
日期:——
Highly efficient palladium precatalysts [RN-(CH2)n-pz3,5-Me2}2]PdCl2}m [m = n = 1; R = 2,6-Me2C6H3 (1), 2,4,6-Me3C6H2 (2), CH2Ph (3) and m = n = 2; R = CH2Ph (4)] of a series of homoscorpionate bispyrazolyl ligands for the Suzuki–Miyaura cross-coupling of the more challenging aryl chloride substrates are reported. In particular, the palladium 1–4 precatalysts carried out the Suzuki–Miyaura cross-coupling
高效率 钯预催化剂[RN -(CH 2)n -pz 3,5-Me 2 } 2 ] PdCl 2 } m [ m = n = 1;R = 2,6-Me 2 C 6 H 3(1),2,4,6-Me 3 C 6 H 2(2),CH 2 Ph(3)和m = n = 2; R = CH 2 Ph(4)]双吡唑基据报道,具有挑战性的芳基氯化物底物的Suzuki-Miyaura交叉偶联的配体。特别是,钯1-4预催化剂对具有吸电子,给电子和杂芳基取代基的多种芳基氯化物底物进行了Suzuki-Miyaura交叉偶联。足够明显的是,通过X射线衍射研究确定了1-4种预催化剂的分子结构,发现在亚甲基桥联的单核1-3种配合物中存在反电[C–H⋯Pd]型相互作用。双吡唑基 配体,而 乙烯桥接类似物4产生了有趣的二聚体20元大环金属配合物,没有任何这种相互作用。