Integration of distinct substrate activation modes in a catalytic circle is critical for the development of new, powerful synthetic methodologies toward complex and value-added chemicals from simple and readily available feedstocks. Here, we describe a highly selective difunctionalization of imines through incorporation of activation of CO2 by intramolecular N/B Lewis pairs into a copper catalytic cycle. Experimental and computational studies on mechanistic aspect revealed an α-borylalkylamido intermediate, a metal amide-based Lewis pair formed by borylation of C-N double bond, enabled an unprecedented CO2 fixation pattern which is in sharp contrast to the traditional CO2 insertion into transition metal-element bonds. The unique lithium cyclic boracarbamate products could be easily transformed into multifunctional N-carboxylated α-amino boronates. The highly diastereoselective reactions of chiral N-tert-butanesulfinyl aldimines were also achieved. We hope that our findings may inspire further development of selective multicomponent reactions by incorporation of Lewis pair chemistry into transition-metal catalysis.

中文翻译：

---

铜催化下生成的路易斯对的 CO2 活化使亚胺的双官能化成为可能

在催化循环中整合不同的底物活化模式对于开发新的、强大的合成方法至关重要，这些方法可以从简单易得的原料中获得复杂和高附加值的化学品。在这里，我们描述了通过将分子内 N/B Lewis 对激活的 CO2 结合到铜催化循环中来实现亚胺的高选择性双官能化。机理方面的实验和计算研究揭示了一种α-硼烷基酰胺中间体，一种由 CN 双键硼化形成的金属酰胺基路易斯对，实现了前所未有的 CO2 固定模式，这与传统的 CO2 插入过渡金属元素形成鲜明对比债券。独特的环状硼氨基甲酸锂产品可以很容易地转化为多功能的 N-羧化 α-氨基硼酸盐。还实现了手性 N-叔丁烷亚磺酰基醛亚胺的高度非对映选择性反应。我们希望我们的发现可以通过将路易斯对化学结合到过渡金属催化中来激发选择性多组分反应的进一步发展。