Photoredox/Nickel Dual Catalysis Enables the Synthesis of Alkyl Cyclopropanes via C(sp<sup>3</sup>)–C(sp<sup>3</sup>) Cross Electrophile Coupling of Unactivated Alkyl Electrophiles
作者:Sayan K. Jana、Mamata Maiti、Purusattam Dey、Biplab Maji
DOI:10.1021/acs.orglett.1c04268
日期:2022.2.18
cyclopropanes via visible light-mediated photoredox/nickel dual catalysis is demonstrated. The challenging intramolecular C(sp3)–C(sp3) cross-electrophile coupling of readily available unactivated 1,3-dialkyl electrophiles was performed under mild conditions that allowed traditionally reactive functional groups to be included. Mechanistic inspection and control experiments revealed the importance of dual catalysis
展示了通过可见光介导的光氧化还原/镍双重催化轻松合成单、1,1-和 1,2-二取代环丙烷。具有挑战性的分子内 C(sp 3 )–C(sp 3 ) 交叉亲电偶联容易获得的未活化的 1,3-二烷基亲电试剂是在温和条件下进行的,该条件允许包含传统的反应性官能团。机械检查和控制实验揭示了双重催化的重要性,反应通过逐步氧化加成和分子内 S N 2 反应进行。