Regioselective Synthesis of Alkylarenes by Two-Step<i>ipso</i>-Substitution of Aromatic Dicarboxylic Acids
作者:Andrea Bramborg、Torsten Linker
DOI:10.1002/ejoc.201200823
日期:2012.10
A strategy for the regioselective alkylation of arenes was developed, starting from commercially available and inexpensive terephthalic acid or naphthalene-1,4-dicarboxylic acid. The method entails a formal ipso-substitution of the carboxylate groups by a sequence of reductive alkylation under Birch conditions and subsequent acid-mediated rearomatization with loss of carbon monoxide and carbon dioxide
开发了一种用于芳烃区域选择性烷基化的策略,从市售且廉价的对苯二甲酸或萘-1,4-二羧酸开始。该方法需要通过一系列在 Birch 条件下的还原性烷基化和随后的酸介导的重构化,在失去一氧化碳和二氧化碳的情况下对羧酸根进行正式的同位取代。合成了 20 多种不同侧链的芳烃。以萘-1,4-二羧酸为原料,我们能够通过在 Birch 还原中选择合适的亲电子试剂来控制烷基化程度。因此,双烷基化萘和萘甲酸可通过化学选择性获得。所有反应均以高产率专门提供单一区域异构体。全面的,