据报道,借助8-氨基喹啉基辅助基团,钴可有效催化芳烃和烯烃的酰氧基化反应。在该转化中,苯甲酸,烯基酸和脂族酸可以容易地参与以提供结构上多样化的酯。值得注意的是,硫酸银(Ag 2 SO 4)氧化剂是可再生的,并且可以除去和回收导向基团。该策略代表了过渡金属催化的烯基羧酰胺C(sp 2)-H键与羧酸的酰氧基化的第一个成功实例。
Ligand-Enabled, Copper-Promoted Regio- and Chemoselective Hydroxylation of Arenes, Aryl Halides, and Aryl Methyl Ethers
作者:Bijaya Kumar Singh、Ranjan Jana
DOI:10.1021/acs.joc.5b02302
日期:2016.2.5
chemoselective hydroxylation. Interestingly, typical regiochemical scrambling associated with the C–H activation was further resolved by introducing a ligand-directed ortho hydroxylation of haloarenes and aryl methyl ethers.