Phosphorus Bonded Directly To Cyano Or To -n=c=x, Wherein X Is Chalcogen Patents (Class 562/877)
  • Patent number: 6218563
    Abstract: The present invention provides a process for preparing a cyanophosphonamide comprising contacting phosphoric anhydride and a cyanide, preferably in the presence of a Lewis base, to produce a cyanophosphonate intermediate, and subsequently contacting the cyanophosphonate intermediate with an amino compound.
    Type: Grant
    Filed: November 29, 1999
    Date of Patent: April 17, 2001
    Assignee: Monsanto Company
    Inventors: Patrick J. Lennon, Serge G. Vulfson