Synthesis of chiral β-aminophosphonates via Rh-catalyzed asymmetric hydrogenation of β-amido-vinylphosphonates
摘要:
The Rh-catalyzed asymmetric hydrogenation of prochiral beta-N-acetylamino-vinylphosphoniites allows the preparation of chiral beta-N-acetylamino-phosphonates with excellent yields (up to 100%) and. high enantioselectivities (up to 92% ee). The reaction is strongly dependent on the chiral bidentate phosphorus ligand and the solvent employed. In several cases an inversion of the induced chirality was noted by using the corresponding E- or Z-isomeric substrates. (C) 2008 Elsevier Ltd. All rights reserved.
Pd(II)-Catalyzed Phosphorylation of Enamido C(sp<sup>2</sup>
)-H Bonds: A General Route to β-Amido-vinylphosphonates
作者:Baokun Qiao、Hao-Qiang Cao、Yin-Jun Huang、Yue Zhang、Jing Nie、Fa-Guang Zhang、Jun-An Ma
DOI:10.1002/cjoc.201800262
日期:2018.9
the synthesis of C–P bonds has been an important focus of research. We herein report a Pd‐catalyzed enamidoC(sp2)–Hphosphorylation for direct construction of C–P bonds under simple and convenient conditions without the need for additional ligands or directing groups. The present reaction can tolerate a wide range of functional groups, and furnish a variety of phosphorylation products including t