Copper-Catalyzed Asymmetric Reaction of Alkenyl Diynes with Styrenes by Formal [3 + 2] Cycloaddition via Cu-Containing All-Carbon 1,3-Dipoles: Access to Chiral Pyrrole-Fused Bridged [2.2.1] Skeletons
作者:Feng-Lin Hong、Yang-Bo Chen、Si-Han Ye、Guang-Yu Zhu、Xin-Qi Zhu、Xin Lu、Rai-Shung Liu、Long-Wu Ye
DOI:10.1021/jacs.0c01918
日期:2020.4.22
metal-containing 1,3-dipoles from metal carbenes represents a significant advance in 1,3-dipolar cycloaddition reactions. However, these transformations have so far been limited to reactions based on diazo compounds or triazoles as precursors. Herein, we disclose a copper-catalyzed enantioselective reaction of alkenyl N-propargyl ynamides with styrene derivatives by formal [3 + 2] cycloaddition via Cu-containing all-carbon
从金属卡宾生成含金属的 1,3-偶极代表 1,3-偶极环加成反应的重大进展。然而,迄今为止,这些转化仅限于基于重氮化合物或三唑作为前体的反应。在此,我们公开了一种铜催化的烯基 N-炔丙基炔酰胺与苯乙烯衍生物的对映选择性反应,通过含铜的全碳 1,3-偶极进行 [3 + 2] 环加成,这构成了生成金属的新方法- 通过金属卡宾含有 1,3-偶极子。该协议允许以中等至良好的产率(高达 90% 的产率)以优异的非对映选择性(dr > 50/1)和通常优异的对映选择性(高达 >99% ee)。