Remote Controlled Nucleophilicity, 2<sup>1</sup>: Lithiated C<sub>α</sub>-Substituted 4-Methylpyridines
作者:Ernst Anders、Andreas Opitz、Walter Bauer
DOI:10.1055/s-1991-28423
日期:——
Cα-substituted 4-methylpyridines have been N-lithiated and reacted with chlorotrimethylsilane and other electrophiles. The lithiated Cα-NMe2 substituted intermediate shows an interesting dichotomy of behavior towards electrophiles: It represents the borderline between compounds for which an extreme N or Cα regio-nucleophilicity is observed.
Cα-取代的4-甲基吡啶已被N-锂化,并与氯三甲基硅烷和其他电亲体反应。锂化的Cα-NMe2取代中间体在对电亲体的反应中表现出有趣的二分法行为:它代表了那些观察到极端N或Cα区位亲核性化合物之间的边界。