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.
STUDIES ON ORGANOPHOSPHORUS COMPOUNDS 100. STEROSELECTIVE SYNTHESIS OF 2-SUBSTITUTed ISOXAZOLINYL METHYLPHOSPHONATES
作者:Chengye Yuan、Shoujun Chen
DOI:10.1080/10426509708044201
日期:1997.4.1
Reaction of dialkyl 1-hydroxy aminophosphonates with aldehydes leads to a nitrone bearing phosphonate moiety. The phosphoryl nitrone thus obtained provides (Z) 2-substituted isoxazolinyl methylphosphonates uponreaction with maleic anhydride as a 1,3-dipolar cycloaddition product.