Reductive CO<sub>2</sub> Fixation via the Selective Formation of C–C Bonds: Bridging Enaminones and Synthesis of 1,4-Dihydropyridines
作者:Yulei Zhao、Xuqiang Guo、Xin Ding、Zheng Zhou、Man Li、Nan Feng、Bowen Gao、Xu Lu、Yunlin Liu、Jinmao You
DOI:10.1021/acs.orglett.0c02963
日期:2020.11.6
bridging of enaminones and synthesis of 1,4-dihydropyridines, respectively. n-Butylamine significantly promoted this CO2 deoxymethylenation procedure catalyzed by 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) and ZnCl2. The mechanism involving the formation of bis(silyl)acetal, nucleophilic addition, and amine elimination was also interpreted to clarify the bridging of two molecules of enaminones with CO2
在本文中,开发了与CO 2的选择性串联C–C键形成反应,以分别实现烯胺酮的桥接和1,4-二氢吡啶的合成。正丁胺极大地促进了1,5,7-三氮杂双环[4.4.0] dec-5-ene(TBD)和ZnCl 2催化的CO 2脱氧甲基化过程。还解释了涉及双(甲硅烷基)乙缩醛形成,亲核加成和胺消除的机理,以阐明两个烯胺酮分子与CO 2的桥联和二氢吡啶衍生物的产生。