Phosphonium Salts as Pseudohalides: Regioselective Nickel‐Catalyzed Cross‐Coupling of Complex Pyridines and Diazines
作者:Xuan Zhang、Andrew McNally
DOI:10.1002/anie.201704948
日期:2017.8.7
traditional cross‐coupling methods. An alternative approach is presented where pyridines and diazines are converted into heteroaryl phosphonium salts and coupled with aryl boronic acids. Nickel catalysts are unique for selective heteroaryl transfer, and the reaction has a broad substrate scope that includes complex pharmaceuticals. Phosphonium ions also display orthogonal reactivity in cross‐couplings compared
杂双芳基化合物是重要的药效团,很难通过传统的交叉偶联方法制备。提出了一种替代方法,其中将吡啶和二嗪转化为杂芳基phospho盐并与芳基硼酸偶联。镍催化剂对于选择性杂芳基转移是独特的,该反应具有广泛的底物范围,包括复杂的药物。与卤化物相比,离子在交叉偶联中也表现出正交反应性,从而实现化学选择性的钯和镍催化的偶联序列。