It Is Not All about the Ligands: Exploring the Hidden Potentials of <i>t</i>Bu<sub>3</sub>P through Its Oxidative Addition Complex as the Precatalyst
作者:Yam N. Timsina、Guolin Xu、Thomas J. Colacot
DOI:10.1021/acscatal.3c01582
日期:2023.6.16
A series of oxidative addition complexes with a general formula (tBu3P)Pd(Ar)X, as a class of precatalysts, were synthesized for challenging Suzuki–Miyaura coupling involving coupling partners, such as (i) sensitive polyfluorinated arylboronic acids or their corresponding boronic esters, (ii) sterically hindered electrophiles, and (iii) sterically hindered nucleophiles. A total of 89 examples are reported
合成了一系列具有通式 ( t Bu 3 P)Pd(Ar)X 的氧化加成配合物,作为一类预催化剂,用于挑战涉及偶联伙伴的 Suzuki-Miyaura 偶联,例如 (i) 敏感的多氟芳基硼酸或它们相应的硼酸酯,(ii) 位阻亲电试剂,和 (iii) 位阻亲核试剂。总共报告了 89 个示例,其中 39 个示例在 Supporting Information 中。这些预催化剂,特别是 ( t Bu 3 P)Pd(4-CF 3 Ph)Br,与通过混合t创建的原位系统相比,被证明是通常用于交叉偶联反应的强大催化系统具有钯前体的Bu 3 P 配体。预催化剂也优于其他单配体系统,例如 Buchwald 的基于双芳基的 G3 或 G4 钯环。此外,( t Bu 3 P)Pd(4-CF 3 Ph)Br 预催化剂对于第二个最流行的偶联反应,即 Buchwald-Hartwig 偶联也非常有效。在这项研究中,受