Visible photocatalysis of novel oxime phosphonates: synthesis of β-aminophosphonates
作者:Yong-Hong Li、Chun-Hai Wang、Su-Qian Gao、Feng-Ming Qi、Shang-Dong Yang
DOI:10.1039/c9cc06075h
日期:——
A novel type of oxime phosphonate was synthesized and used in the intermolecular cascade radical addition reaction of alkenes to access β-aminophosphonates via visible-light-driven N-centered iminyl radical-mediated and redox-neutral selective C–P single-bond cleavage in an active phosphorus radical route. The procedure is characterized by its ability to achieve the construction of Csp3–P and Csp3–N
Palladium-Catalyzed Asymmetric Hydrogenation of<i>N</i>-Hydroxy-α-imino Phosphonates Using Brønsted Acid as Activator: The First Catalytic Enantioselective Approach to Chiral<i>N</i>-Hydroxy-α-amino Phosphonates
作者:Nataliya S. Goulioukina、Ilya A. Shergold、Grigorii N. Bondarenko、Mikhail M. Ilyin、Vadim A. Davankov、Irina P. Beletskaya
DOI:10.1002/adsc.201200170
日期:2012.10.8
The enantioselective synthesis of ring-substituted [N-(hydroxy)amino](phenyl)methylphosphonic esters via asymmetric hydrogenation of the corresponding N-hydroxy-α-imino phosphonates with up to 90% ee was developed using catalytic amounts of palladium(II) acetate and (R)-BINAP in 2,2,2-trifluoroethanol with a Brønsted acid as an activator.