(DEAD) together with Oxone or K2S2O8. Substrates such as 2-arylpyridines, pyrrolidinone, acetylindoline, quinoline, and oximes were ethoxycarbonylated with excellent chemo- and regioselectivities. The catalytic reaction is probably initiated by chelation-assisted cyclopalladation of the ortho-C−H bond. Preliminary studies suggested that reactive ethoxyacyl radicals generated from thermal decomposition
该通讯描述了使用偶氮二
羧酸二
乙酯 (
DEAD) 和 Oxone 或 K2S2O8 的 Pd(OAc)2 催化芳族 CH 键的乙氧基羰基化反应。2-芳基
吡啶、
吡咯烷酮、乙酰二氢
吲哚、
喹啉和
肟等底物被乙氧基羰基化,具有优异的
化学和区域选择性。催化反应可能是由邻位-CH 键的螯合辅助环
钯化引发的。初步研究表明,
DEAD 热分解产生的反应性乙氧基酰基自由基参与了酯的形成。