Copper-Mediated<i>ortho</i>-Nitration of (Hetero)Arenecarboxylates
作者:Dmitry Katayev、Kai F. Pfister、Timo Wendling、Lukas J. Gooßen
DOI:10.1002/chem.201403363
日期:2014.8.4
Various (hetero)arenecarboxylic acids were converted to the corresponding Daugulis amides and nitrated selectively in the ortho‐position in the presence of [CuNO3(PPh3)2] and AgNO2 at 50 °C. A microwave‐assisted saponification allows regenerating the carboxylate group within minutes, which may then be removed tracelessly by protodecarboxylation, or substituted by aryl‐ or alkoxy‐groups via decarboxylative
Copper-Mediated<i>ortho</i>-Nitration of Arene and Heteroarene CH Bonds Assisted by an 8-Aminoquinoline Directing Group
作者:Jidan Liu、Shaobo Zhuang、Qingwen Gui、Xiang Chen、Zhiyong Yang、Ze Tan
DOI:10.1002/adsc.201400947
日期:2015.3.9
A copper‐mediated, chelation‐assisted ortho CH bond nitration of benzoic acid derivatives using sodium nitrite as the source of the nitro group has been achieved with the aid of an 8‐aminoquinoline directing group. Selective mono‐ or dinitration can be achieved by simply changing the reaction conditions. The method shows excellent functional group tolerance and provides a novel and straightforward