Patents Assigned to Shell Internationale Research Naatschappy B.V.
  • Process for the preparation of benzoyl ureas
    Patent number: 4918227
    Abstract: Benzoyl ureas of the formula ##STR1## are prepared by starting from benzoyl derivatives of the formulaQ-COHalwhich are converted via the corresponding azides into the isocyanates, which are in turn reacted with corresponding benzamides.
    Type: Grant
    Filed: February 9, 1987
    Date of Patent: April 17, 1990
    Assignee: Shell Internationale Research Naatschappy B.V.
    Inventors: Heinz M. Becher, Rudolf Mengel, Walter Ost