AbstractThis report has realized the catalytic asymmetric [3+2] annulation of benzylideneindolinones with CF3‐containing isatin‐derived azomethine ylides for the first time, in which the organocatalysis has failed. In the presence of dinuclear zinc catalysts, a series of functionalized 2,3‐pyrrolidinyl dispirooxindoles have been synthesized in good yields with excellent stereoselectivity under mild reaction conditions. This protocol can be run on a gram scale and a possible catalytic mechanism is proposed.
摘要 本报告首次实现了有机催化失效的苄叉吲哚酮与含CF3的异汀衍生偶氮亚甲基酰化物的催化不对称[3+2]环化反应。在双核锌催化剂存在下,我们在温和的反应条件下合成了一系列官能化的 2,3-吡咯烷基二吡咯吲哚,产率高,立体选择性好。该方案可在克级规模上运行,并提出了一种可能的催化机理。