Design and preparation of new palladium precatalysts for C–C and C–N cross-coupling reactions
作者:Nicholas C. Bruno、Matthew T. Tudge、Stephen L. Buchwald
DOI:10.1039/c2sc20903a
日期:——
of easily prepared, phosphine-ligated palladium precatalysts based on the 2-aminobiphenyl scaffold have been prepared. The role of the precatalyst-associated labile halide (or pseudohalide) in the formation and stability of the palladacycle has been examined. It was found that replacing the chloride in the previous version of the precatalyst with a mesylate leads to a new class of precatalysts with
已经制备了一系列基于 2-氨基联苯支架的易于制备的膦连接钯预催化剂。已经研究了前催化剂相关的不稳定卤化物(或拟卤化物)在钯环的形成和稳定性中的作用。发现用甲磺酸盐代替先前版本的预催化剂中的氯化物产生了一类具有改进的溶液稳定性并且易于从更广泛的膦配体制备的新类型的预催化剂。探讨了先前版本的 precatalyst 与此处报告的版本之间的差异。此外,后者的反应性在一系列 C-C 和 C-N 键形成反应中进行了检查。