New Modes of Reactivity in the Threshold of the Reduction Potential in Solution. Alkylation of Lithium PAH (Polycyclic Aromatic Hydrocarbon) Dianions by Primary Fluoroalkanes: A Reaction Pathway Complementing the Classical Birch Reductive Alkylation
作者:Cristóbal Melero、Raquel P. Herrera、Albert Guijarro、Miguel Yus
DOI:10.1002/chem.200700187
日期:2007.12.17
Some of the most highly reduced organic species in solution, such as the dianions of PAHs (polycyclic aromatic hydrocarbons) display unexpected reactivity patterns when they react with an appropriate counterpart. As seen before in their reaction with propene and other alkenes, PAHs(-2) apparently react with fluoroalkanes in a nucleophilic fashion in spite of being generally regarded as powerful electron-transfer
溶液中还原度最高的一些有机物,例如PAHs(多环芳烃)的二价阴离子,当与适当的对应物发生反应时,会表现出出乎意料的反应模式。正如之前在与丙烯和其他烯烃的反应中所见,PAHs(-2)显然以亲核方式与氟代烷烃反应,尽管在与卤代烷烃的反应中通常被认为是强大的电子转移试剂。该方法通过允许使用一组新的区域异构体来补充当前的多环芳烃还原烷基化方法,从而可以通过简单的MO计算轻松预测其区域化学。