Patents Assigned to A. H. Marks & Co., Limited
  • Process for the manufacture of aromatic cyanides
    Patent number: 4378319
    Abstract: The invention provides a process for the preparation of ortho- and para-hydroxybenzyl cyanides. The process of the invention comprises the reaction of an aromatic alcohol selected from ortho- and para-hydroxybenzyl alcohols with a cyanide reagent and an ester capable of esterifying the hydroxyl group of the benzyl alcohol.In a preferred form of the process there is employed a route via the reaction of an ortho- or para-hydroxybenzyl formate with a cyanide reagent preferably selected from sodium and potassium cyanides.
    Type: Grant
    Filed: October 29, 1981
    Date of Patent: March 29, 1983
    Assignee: A. H. Marks & Co., Limited
    Inventors: Robert H. Stanley, Nathan C. Hindley