Cu/Pd Synergistic Dual Catalysis: Asymmetric α‐Allylation of an α‐CF
<sub>3</sub>
Amide
作者:Akira Saito、Naoya Kumagai、Masakatsu Shibasaki
DOI:10.1002/anie.201702113
日期:2017.5.8
elusive. Herein, we report the strategic merger of CuI/base‐catalyzed enolization of an α‐CF3 amide and Pd0‐catalyzed allylic alkylation in an enantioselective manner to deliver chiral building blocks bearing a stereogenic carbon center connected to a CF3, an amide carbonyl, and a manipulable allylic group. The phosphine complexes of CuI and Pd0 engage in distinct catalytic roles without ligand scrambling
尽管对含氟化学实体的需求迅速增长,但仍难以构建含CF 3的立体异构中心。此,我们报告Cu的战略合并我/α-CF的碱催化的烯醇化3酰胺和Pd 0 -催化的烯丙基烷基化在对映选择性方式提供手性构建块轴承连接到CF立体异构碳中心3,一个酰胺羰基和可操作的烯丙基。Cu I和Pd 0的膦配合物在没有配体争夺的情况下发挥独特的催化作用,使双重催化作用可实现酰胺的不对称α-烯丙基化。所得到的立体选择性环化α-CF 3 -γ,δ-不饱和酰胺,得到四氢吡喃和γ内酯稠环丙烷骨架亮点本催化方法的合成可用作一个新的条目,以非外消旋CF 3含化合物。