A novel palladium-catalyzed C-H formylation of electron-rich N-, O-, and S-containing heteroarenes has been developed. The key to success is that the commercially available BrCHCl2 was used as a stoichiometric carbonyl source. Mechanistic investigations indicated that different from the known Reimer-Tiemann reaction, this net C-H formylation proceeded through an electrophilc radical-type path.
已经开发了新型的
钯催化的富电子的N,O和S杂
芳烃的CH甲酰化反应。成功的关键是将市售的BrCHCl 2用作
化学计量的羰基来源。机理研究表明,与已知的Reimer-Tiemann反应不同,这种净的CH甲酰化反应是通过亲电子自由基类型的路径进行的。