Regioselective Arene Functionalization: Simple Substitution of Carboxylate by Alkyl Groups
作者:Tobias Krüger、Katja Vorndran、Torsten Linker
DOI:10.1002/chem.200901774
日期:2009.11.9
from toluic and naphthoic acids, the carboxylate group was conveniently substituted by alkyl halides by Birch reduction and subsequent decarbonylation. The method is characterized by inexpensive starting materials and reagents, and methylation of arenes was realized. Besides simple alkyl substituents, the scope of arene functionalization was extended by benzyl, fluoro, amino, and ester groups. We were
具有各种烷基侧链的芳烃以高收率和优异的区域选择性合成。从甲苯甲酸和萘甲酸开始,通过桦木还原和随后的脱羰作用,羧酸根基团可以方便地被烷基卤取代。该方法的特点是原料和试剂便宜,实现了芳烃的甲基化。除了简单的烷基取代基以外,芳烃官能化的范围还扩大了苄基,氟,氨基和酯基。通过添加叔丁醇,我们能够在桦木还原过程中控制1-萘甲酸的烷基化。这样就可以从相同的原料进行区域选择性合成单和双取代的萘。