Photoinduced Regioselective Perfluoroalkylation/Cyclization Cascade of 3‐Aza‐1,5‐Dienes: Access to Pentasubstituted 3‐Perfluoroalkyl‐1,3‐Dihydropyrrol‐2‐Ones
Bridging a gap: A cationic rhodium(I)/ligand complex catalyzes the title reaction of alkynes and amide‐linked 1,5‐dienes, leading to bridged multicyclic compounds, with high chemo‐, regio‐, and enantioselectivity (see scheme; Bn=benzyl).
Metal-Free Generation of Acyl Radical via Photoinduced Single-Electron Transfer from Lewis Base to Acyl Chloride
作者:Lei Bao、Zhi-Xiang Wang、Xiang-Yu Chen
DOI:10.1021/acs.orglett.2c03339
日期:2022.11.11
We herein describe a simple approach for generating acyl radical from acyl chloride via photoinduced single-electron transfer. It has been demonstrated that the generated acyl radicals could react with various substrates, including isocyanides, methacrylamides, alkenes, alkynes, and enynes, to afford diverse heterocycles (>10 classes). Mechanistic analyses show that a photoactive charge transfer complex
A self-photocatalyzed perfluoroalkylation/cyclization cascade of 3-aza-1,5-dienes enabled by an unprecedented cation-π-interaction is presented. The reaction proceeds with a great regioselectivity to provide 3-perfluoroalkyl-4-pyrrolin-2-ones under exogenous-photocatalyst-, transition-metal- and organoamine-free conditions, with Cs2CO3 playing dual roles as both a photoactivator and a base. It is readily
提出了一种由前所未有的阳离子-π-相互作用实现的3-氮杂-1,5-二烯的自光催化全氟烷基化/环化级联。该反应在无外源光催化剂、过渡金属和有机胺的条件下以良好的区域选择性进行,生成3-全氟烷基-4-吡咯啉-2-酮,其中Cs 2 CO 3 起到光活化剂和光活化剂的双重作用。根据。它很容易扩展到 2 克规模,并且可以由自然阳光诱导。
Electrochemical or Photoelectrochemical Alkenylpolyfluoroalkylation of 3-Aza-1,5-dienes: Regioselective Entry to Polyfluoroalkylated 4-Pyrrolin-2-ones