The enantioselective desymmetrization of cyclic meso‐anhydrides with benzyl trifluoroborates under nickel‐photoredox catalysis is described. The reaction tolerates a variety of sterically and electronically different trifluoroborates, as well as structurally unique cyclic anhydrides. The trans isomer of the keto‐acid products is also observed at varying levels dependent on the trifluoroborate identity
描述了在
镍-光氧化还原催化下,三
氟硼酸苄酯对环状介孔酸酐的对映选择性脱对称。该反应耐受各种空间和电子上不同的三
氟硼酸酯,以及结构独特的环状酸酐。取决于三
氟硼酸盐的特性和相对的催化剂负载量,还可以观察到不同
水平的
酮酸产物的反式异构体。提出了涉及Ni II加合物的脱羰作用和Ni-C键均质化的机理。该功能使顺式内消旋酸酐能以高对映选择性获得反式
酮酸,这是主要产物。