Regiospecific Synthesis of Substituted 2-Nitrobenzaldehydes from Benzaldehydes through Palladium-Catalyzed Chelation-Assisted C-H Nitration
作者:Wei Zhang、Degui Wu、Jian Zhang、Yunkui Liu
DOI:10.1002/ejoc.201402451
日期:2014.9
A regiospecific synthesis of substituted 2-nitrobenzaldehydes from substituted benzaldehydes has been developed that involves a three-step process with palladium-catalyzed chelation-assisted C–H nitration as the key step. In the process, O-methyl aldoxime serves as a removable directing group for the palladium-catalyzed ortho-nitration of substituted benzaldoximes and it can be removed in subsequent
已经开发出一种由取代苯甲醛区域特异性合成取代 2-硝基苯甲醛的方法,该方法涉及三步法,其中钯催化的螯合辅助 C-H 硝化作为关键步骤。在该方法中,O-甲基醛肟作为钯催化的取代苯甲醛肟的邻硝化的可去除导向基团,并且可以在随后将所得2-硝基苯甲醛肟转化为2-硝基苯甲醛时去除。