Iodination of Remote <i>Ortho</i>-C–H Bonds of Arenes via Directed S<sub>E</sub>Ar: A Streamlined Synthesis of Tetrahydroquinolines
作者:William A. Nack、Gang He、Shu-Yu Zhang、Chengxi Lu、Gong Chen
DOI:10.1021/ol4015078
日期:2013.7.5
A new strategy for the synthesis of tetrahydroquinolines (THQs) via the sequential functionalizations of remote C–H bonds is reported. This method uses a single picolinamide directing/protecting group to effect Pd-catalyzed γ-C(sp3)–H arylation, metal-free ε-C(sp2)–H iodination, and Cu-catalyzed intramolecular C–N cross-coupling. The overall sequence is efficient and versatile, and offers a streamlined
据报道,通过远程C–H键的顺序官能化合成四氢喹啉(THQs)的新策略。该方法使用单个吡啶甲酰胺导向/保护基团来实现Pd催化的γ-C(sp 3)–H芳基化,无金属的ε-C(sp 2)–H碘化和Cu催化的分子内C–N交叉耦合。整个序列高效且通用,可从容易获得的芳基碘化物和脂族胺前体中轻松合成具有复杂取代模式的THQ。