作者:Bifu Liu、Wensen Ouyang、Jianhong Nie、Yang Gao、Kejun Feng、Yanping Huo、Qian Chen、Xianwei Li
DOI:10.1039/d0cc04739b
日期:——
coordinated amine derivative enabled regioselective C–H functionalization remains challenging due to the elusive achievement of reactivity and selectivity simultaneously. Herein, regioselective C–Halkynylation of various readily transformable nitrogen functionalities was developed with great efficiency, with the assistance of the mono-N-protected amino acid (MPAA) ligand via Pd(II) catalysis proceeding via
Pd(II)-Catalyzed <i>o</i>-C−H Acetoxylation of Phenylalanine and Ephedrine Derivatives with MeCOOO<sup><i>t</i></sup>Bu/Ac<sub>2</sub>O
作者:Chris J. Vickers、Tian-Sheng Mei、Jin-Quan Yu
DOI:10.1021/ol1007108
日期:2010.6.4
Pd(II)-catalyzed ortho C-H acetoxylation of triflate protected phenethyl- and phenpropylamines has been achieved with tert-butyl peroxyacetate as the stoichiometric oxidant and either DMF or CH3CN as the promoter. The reaction was found to tolerate a large variety of functional groups and could be combined with subsequent intramolecular amination to afford functionalized indoline derivatives.
Palladium-Catalyzed [5 + 2] Heteroannulation of Phenethylamides with 1,3-Dienes to Dopaminergic 3-Benzazepines
作者:Álvaro Velasco-Rubio、Jesús A. Varela、Carlos Saá
DOI:10.1021/acs.orglett.0c01053
日期:2020.5.1
Phenethyltriflamides react with 1,3-dienes upon treatment with a catalytic amount of Pd(OAc)(2) and Cu(OAc)(2)/O-2 as oxidant to afford chemo-, regio- and diastereoselectively 2,3,4,5-tetrahydro-1H-benzo[d]azepines (3-benzazepine derivatives) in good to excellent yields. A DFT study of the [5 + 2] heteroannulation suggests a mechanistic pathway starting with formation of the six-membered palladacycle cis-PdX2L2 via a CMD process followed by eta(2) coordination and insertion of the 1,3-diene unit in a diastereoselective manner.