Intramolecular Palladium(II)-Catalyzed 6-<i>endo</i> C–H Alkenylation Directed by the Remote <i>N</i>-Protecting Group: Mechanistic Insight and Application to the Synthesis of Dihydroquinolines
作者:Asier Carral-Menoyo、Lia Sotorríos、Verónica Ortiz-de-Elguea、Aitor Diaz-Andrés、Nuria Sotomayor、Enrique Gómez-Bengoa、Esther Lete
DOI:10.1021/acs.joc.9b03174
日期:2020.2.21
protocol for the Pd(II)-catalyzed C-H alkenylation reaction of substituted N-allylanilines via an unusual 6-endo process has been developed. A density functional theory (DFT) study of the mechanistic pathway has shown that the coordination of the remote protecting group to the palladium center is determinant for the control of the regioselectivity in favor of the 6-endo process. The reaction would proceed
已经开发了经由不寻常的6-内基过程的Pd(II)催化的取代N-烯丙啉的CH烯基化反应的方案。机理的密度泛函理论(DFT)研究表明,远程保护基团与钯中心的配位是决定区域选择性的决定因素,有利于6-内基过程。该反应将通过烯烃的预先活化而进行。该程序构成了一种从简单且易于接近的底物合成1,4-二氢喹啉衍生物的温和而有效的方法。