Highly enantioselective hydrogenation of N-phthaloyl enamides
作者:Qin Yang、Wenzhong Gao、Jingen Deng、Xumu Zhang
DOI:10.1016/j.tetlet.2005.11.064
日期:2006.1
Rh- or Ru-catalyzed highly enantioselective hydrogenation of N-phthaloyl enamides is presented. Electron-rich Tang-Phos and DuanPhos are found to be effective ligands for Rh-catalyzed hydrogenation of alpha-aryl enamides and up to 99% ee has been achieved. In contrast, for the hydrogenation of alpha-alkyl enamide.. the Ru-C-3-TunePhos complex is more effective and up to 69% ee can be observed. This work is the first report of the hydrogenation of N-phthaloyl enamides. (c) 2005 Elsevier Ltd. All rights reserved.
A facile approach to β-amino acid derivatives via palladium-catalyzed hydrocarboxylation of enimides with formic acid
作者:Jie Dai、Wenlong Ren、Haining Wang、Yian Shi
DOI:10.1039/c5ob01304f
日期:——
An effective Pd(0)-catalyzed hydrocarboxylation of enimides with formicacid in the presence of a catalytic amount of HCOOPh is described. A variety of β-amino acid derivatives are obtained in good yields with high regioselectivities without using external toxic CO gas.
Aerobic Oxidative Amination of Unactivated Alkenes Catalyzed by Palladium
作者:Jodie L. Brice、Jenna E. Harang、Vitaliy I. Timokhin、Natia R. Anastasi、Shannon S. Stahl
DOI:10.1021/ja0433020
日期:2005.3.9
been identified. To be successful, these reactions must be conducted under cocatalyst-free conditions that involve direct dioxygen-coupled turnover of the palladium catalyst. The oxidative amination products of norbornene and other cyclic alkenes implicate a cis-aminopalladation mechanism.