Pd
<sup>II</sup>
‐Catalyzed Enantioselective C(sp
<sup>3</sup>
)−H Activation/Cross‐Coupling Reactions of Free Carboxylic Acids
作者:Liang Hu、Peng‐Xiang Shen、Qian Shao、Kai Hong、Jennifer X. Qiao、Jin‐Quan Yu
DOI:10.1002/anie.201813055
日期:2019.2.11
carboxylic acids with organoborons has been realized using either mono-protected amino acid (MPAA) ligands or mono-protected aminoethyl amine (MPAAM) ligands. A diverse range of aryl- and vinyl-boron reagents can be used as coupling partners to provide chiral carboxylic acids. This reaction provides an alternative approach to the enantioselective synthesis of cyclopropanecarboxylic acids and cyclobutanecarboxylic
使用单保护的氨基酸(MPAA)配体或单保护的氨基乙胺(MPAAM)配体已经实现了PdII催化的游离羧酸与有机硼的对映选择性C(sp3)-H交叉偶联。各种各样的芳基和乙烯基硼试剂可以用作偶联伙伴,以提供手性羧酸。该反应为包含α-手性叔和季立体中心的环丙烷羧酸和环丁烷羧酸的对映选择性合成提供了另一种方法。通过将羧酸转化为环丙胺而不损失光学活性,进一步证明了该反应的实用性。