Remote Giese Radical Addition by Photocatalytic Ring Opening of Activated Cycloalkanols
作者:Noelia Salaverri、Benedetta Carli、Patricia B. Gratal、Leyre Marzo、José Alemán
DOI:10.1002/adsc.202200220
日期:2022.5.17
to new radical intermediates for synthesis such as alkyl radicals in remote positions to a ketone. Herein, we present the addition of these remote alkyl radicals to electron deficient double bonds under photoorganocatalyzed and very mild conditions. The method is not only applicable to diactivated double bonds, but monoactivated ones are also accessible using more stabilized alkyl radicals, and alkyl
质子耦合电子转移 (PCET) 工艺在有机合成中的应用为合成新的自由基中间体打开了大门,例如远离酮的烷基自由基。在这里,我们提出了在光有机催化和非常温和的条件下将这些远程烷基自由基添加到缺电子双键上。该方法不仅适用于双活化双键,单活化双键也可以使用更稳定的烷基自由基,并且可以引入任意长度的烷基链。最终产品可以通过一锅法轻松转化为更复杂的结构,并且活化官能团转化为更通用的甲酯。机制研究支持基于 PCET 过程的机制建议。