Enantio‐ and Regioconvergent Nickel‐Catalyzed C(sp
<sup>3</sup>
)−C(sp
<sup>3</sup>
) Cross‐Coupling of Allylic Electrophiles Steered by a Silyl Group
作者:Nektarios Kranidiotis‐Hisatomi、Hong Yi、Martin Oestreich
DOI:10.1002/anie.202102233
日期:2021.6.7
alkyl-substituted acyclic allylic systems with a stereocenter in the allylic position is reported. The asymmetric induction and the site selectivity are controlled in an enantio- and regioconvergent nickel-catalyzed C(sp3)−C(sp3) cross-coupling of regioisomeric mixtures of racemic α-/γ-silylated allylic halides and primary alkylzinc reagents. The silyl group steers the allylic displacement towards the
报告了对映选择性和非对映选择性合成在烯丙基位置具有立体中心的完全烷基取代的无环烯丙基系统的两步序列。在对映体和区域会聚镍催化的 C(sp 3 )-C(sp 3 ) 交叉偶联的外消旋 α-/γ-甲硅烷基化烯丙基卤化物和伯烷基锌试剂的区域异构混合物中,不对称诱导和位点选择性受到控制。甲硅烷基引导烯丙基置换朝向乙烯基硅烷区域异构体的形成,并且所得的 C(sp 2 )-Si 键用作在后续步骤中安装各种 C(sp 3 ) 取代基的关键。