PAd2‐DalPhos Enables the Nickel‐Catalyzed C−N Cross‐Coupling of Primary Heteroarylamines and (Hetero)aryl Chlorides
作者:Jillian S. K. Clark、Michael J. Ferguson、Robert McDonald、Mark Stradiotto
DOI:10.1002/anie.201900095
日期:2019.5.6
(hetero)aryl chlorides, while sought‐after given the ubiquity of unsymmetrical di(hetero)arylamino fragments in pharmacophores, are unknown. Herein, we disclose the new “double cage” bisphosphine PAd2‐DalPhos (L2). The derived air‐stable NiII pre‐catalyst C2 functions well at low loadings in challenging test C−N cross‐couplings with established substrates, and facilitates the first Ni‐catalyzed C−N cross‐couplings
能够通过伯杂芳基胺和(杂)芳基氯的交叉偶联而使杂原子致密分子组装的贱金属催化剂,尽管在药效基团中普遍存在不对称的二(杂)芳基氨基片段,仍是人们所不希望的。在这里,我们公开了新的“双笼”双膦PAd2-DalPhos(L2)。衍生的空气稳定的Ni II预催化剂C2在低负荷下能很好地与既定底物进行具有挑战性的C-N交叉偶联,并促进了五元或六元一级镍催化的C-N交叉偶联的进行。环杂芳基胺和活化的(杂)芳基氯化物,具有在合成上有用的范围,可与Pd催化竞争。