Generation of Diarylcarbenium Ion Pools via Electrochemical C–H Bond Dissociation
作者:Masayuki Okajima、Kazuya Soga、Takashi Watanabe、Kimitada Terao、Toshiki Nokami、Seiji Suga、Jun-ichi Yoshida
DOI:10.1246/bcsj.82.594
日期:2009.5.15
The “cation pools” of diarylcarbenium ions have been generated by the low-temperature electrochemical oxidation of diphenylmethane derivatives. In addition to diphenylmethanes having various substituents, 9,10-dihydroanthracene, dibenzosuberane, and xanthenes, which are annulated derivatives of diphenylmethane were also found to serve as a precursor of cation pools. The generation of the diarylcarbenium ion was confirmed by low-temperature NMR analysis and cold-spray mass analysis. Reactivity was also investigated by reactions with various carbon nucleophiles such as allyltrimethylsilane, 1,3,5-trimethylbenzene, and anisole.
通过二苯甲烷衍生物的低温电化学氧化,生成了二芳基碳正离子"离子池"。除了具有各种取代基的二苯甲烷外,我们还发现9,10-二氢蒽、二苯并苏烯和氧杂蒽等二苯甲烷的稠合衍生物也能作为离子池的前体。通过低温NMR分析和冷喷雾质谱分析证实了二芳基碳正离子的生成。此外,还研究了其与各种碳亲核试剂如烯丙基三甲基硅烷、1,3,5-三甲基苯和茴香的反应活性。