(APIs). Site (Cl vs Br on electrophile) and nucleophile (amine vs imine) selectivity is dictated by the catalyst employed. A Pd-crotyl(t-BuXPhos) precatalyst selectively coupled the Ar–Br of the polyhaloarene with benzophenone imine, even in the presence of a secondary amine, while Pd-based RuPhos or (BINAP)Pd(allyl)Cl coupled the Ar–Cl site with secondary amines.
开发了一种
化学选择性顺序一锅偶联方案,以高产率制备几种
氨基
苯胺,作为活性药物成分(A
PI)的组成部分。位点(亲电试剂上的Cl对Br)和亲核试剂(胺对
亚胺)的选择性由所用催化剂决定。Pd-
巴豆基(t - BuXPhos)预催化剂即使在存在仲胺的情况下也选择性地将聚卤代
芳烃的Ar-Br与
二苯甲酮亚胺偶联,而Pd基的RuPhos或(BINAP)Pd(烯丙基)Cl偶联Ar- Cl位带有仲胺。