Chiral 2-Aryl Ferrocene Carboxylic Acids for the Catalytic Asymmetric C(sp<sup>3</sup>)–H Activation of Thioamides
作者:Daichi Sekine、Kazuki Ikeda、Seiya Fukagawa、Masahiro Kojima、Tatsuhiko Yoshino、Shigeki Matsunaga
DOI:10.1021/acs.organomet.9b00407
日期:2019.10.28
cyclopentadienyl (Cp) ligands. Although it has recently been demonstrated that chiral carboxylic acids combined with achiral Cp-type ligands can enable highly enantioselective C–H functionalization reactions, the structural diversity of the applied chiral acids remains limited. Here, we report that chiral 2-aryl ferrocene carboxylic acids, which are easily obtained from diastereoselective ortho lithiation and Suzuki–Miyaura
主要在精心设计的手性环戊二烯基(Cp)配体的开发基础上,研究了使用三价9族金属(Co,Rh,Ir)的对映选择性C–H官能化反应。尽管最近已证明手性羧酸与非手性Cp型配体结合可以实现高度对映选择性的CH功能化反应,但所应用手性酸的结构多样性仍然受到限制。在这里,我们报道,很容易从非对映选择性邻位锂化和Suzuki-Miyaura偶合获得的手性2-芳基二茂铁羧酸可以作为Cp * Co III催化的对映选择性C(sp 3)-H酰胺化的外部手性来源。二恶唑酮合成α-芳基硫酰胺。