Pd-Catalyzed Intramolecular Aminoalkylation of Unactivated Alkenes: Access to Diverse <i>N</i>-Heterocycles
作者:Liu Ye、Kai-Yip Lo、Qiangshuai Gu、Dan Yang
DOI:10.1021/acs.orglett.6b03295
日期:2017.1.20
A highly efficient palladium-catalyzedintramolecular aminoalkylation of unactivatedalkenes in the absence of an external ligand and oxidant is described. New C–N and C(sp3)–C(sp3) bonds are formed simultaneously. This general transformation allows for construction of diverse N-heterocycles. Mechanistic studies show that the process may involve a four-membered Pd(alkyl)amido intermediate.
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