Dual Photoredox/Copper Catalysis for the Remote C(sp<sup>3</sup>
)−H Functionalization of Alcohols and Alkyl Halides by <i>N</i>
-Alkoxypyridinium Salts
作者:Xu Bao、Qian Wang、Jieping Zhu
DOI:10.1002/anie.201813356
日期:2019.2.11
Under mild dual photoredox/copper catalysis, the reaction of N‐alkoxypyridinium salts with readily available silyl reagents (TMSN3, TMSCN, TMSNCS) afforded δ‐azido, δ‐cyano, and δ‐thiocyanato alcohols in high yields. The reaction went through a domino process involving alkoxy radical generation, 1,5‐hydrogen atom transfer (1,5‐HAT) and copper‐catalyzed functionalization of the resulting C‐centered
在温和的双重光氧化还原/铜催化下,N-烷氧基吡啶鎓盐与易于获得的甲硅烷基试剂(TMSN 3,TMCSN,TMSNCS)的反应可高产率提供δ-叠氮基,δ-氰基和δ-硫氰基醇。该反应经历了一个多米诺骨牌过程,该过程涉及烷氧基自由基的产生,1,5-氢原子转移(1,5-HAT)以及铜催化的C中心自由基的官能化。还记录了催化对映选择性δ-C(sp 3)-H氰化的条件。