Light‐Induced Gold‐Catalyzed Hiyama Arylation: A Coupling Access to Biarylboronates
作者:Jin Xie、Kohei Sekine、Sina Witzel、Petra Krämer、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1002/anie.201806427
日期:2018.12.17
photochemical gold‐catalyzed chemo‐selective Hiyama arylation of B,Si bifunctionalized reagents with diazonium salts, which is orthogonal to common strategies and therefore a unique tool for synthesis of valuable biarylboronates. With this new methodology a wide array of diversely functionalized sp2‐ and sp3‐hybridized biarylboronates were obtained. Notably, the synergism of gold catalysis with copper catalysis
Organoboron化合物是通用的合成构件。我们在此报告了一种新的策略,即光化学金催化的B,Si双功能化试剂与重氮盐的金化学选择性的Hiyama芳基化反应,该策略与常用策略正交,因此是合成有价值的联芳基硼酸酯的独特工具。通过这种新方法,获得了各种功能化的sp 2-和sp 3-杂交联芳基硼酸酯。值得注意的是,金催化与铜催化或钯催化的协同作用允许一锅式迭代C-X(杂原子)和C-C偶联,将几个简单的片段快速组装成相对复杂的分子。机理研究表明,无光敏剂的条件优于金/ Ru(bpy)3Cl 2双重催化。