Iron-Catalyzed Tandem Cyclization and Cross-Coupling Reactions of Iodoalkanes and Aryl Grignard Reagents
作者:Jae Gon Kim、Young Hoon Son、Jin Won Seo、Eun Joo Kang
DOI:10.1002/ejoc.201403511
日期:2015.3
Several experimental results, such as cyclopropyl ring opening, the stereochemical outcome of the reaction with a secondary iodide substrate, and intermediate identification with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO), support the conclusion that a radical process is involved in this catalytic system. Moreover, deuterium labeling experiments indicated that radical disproportionation could occur in
一系列芳甲基取代的吡咯烷和四氢呋喃是通过 FeCl2 催化的烷基碘和芳基格氏试剂的串联环化和交叉偶联反应产生的。烯烃上的取代基对串联反应的进展有深远的影响,二取代和三取代的烯烃提供环化吡咯烷。几个实验结果,如环丙基开环、与二级碘底物反应的立体化学结果,以及用 2,2,6,6-四甲基哌啶-1-氧基 (TEMPO) 鉴定中间体,支持自由基过程的结论参与了这个催化系统。此外,氘标记实验表明,在环化烷基自由基物种的终止反应中可能发生自由基歧化。