Evidence against Single-Electron Transfer in the Additions of Most Organomagnesium Reagents to Carbonyl Compounds
作者:Nicole D. Bartolo、K. A. Woerpel
DOI:10.1021/acs.joc.0c00481
日期:2020.6.19
A radical clock system was developed to investigate single-electron transfer (SET) in the reactions of organomagnesium reagents with carbonyl compounds. The fluorenylcyclopropyl radical clock was selected because it is the fastest known radical clock. Additions of Grignard reagents to aldehydes or methyl ketones provided no evidence for ring-opened products that would indicate reaction through SET
开发了一种自由基时钟系统,以研究有机镁试剂与羰基化合物反应中的单电子转移(SET)。选择芴基环丙基自由基钟是因为它是已知最快的自由基钟。向醛或甲基酮中添加格氏试剂没有提供开环产物的证据,该产物表明通过SET反应。但是,将某些格氏试剂添加到芳族酮中会导致开环产物的形成,这表明存在SET。