Patents by Inventor Donna M. Borek

Donna M. Borek has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Preparation of physostigmine carbamate derivatives from physostigmine
    Patent number: 5498726
    Abstract: This application relates to a new process for the preparation of a product of the formula ##STR1## wherein R, R.sup.1, R.sup.2, X and m are as defined within, which process comprises preparing treating a compound such as physostigmine to form eseroline which is then treated with an appropriate compound or its equivalent. Acetic acid is added to the reaction mixture after the formation of eseroline.
    Type: Grant
    Filed: March 22, 1994
    Date of Patent: March 12, 1996
    Assignee: Hoechst-Roussel Pharmaceuticals Incorporated
    Inventors: George E. Lee, Thomas B. K. Lee, Donna M. Borek
  • Method of reducing a carbonyl containing acridine
    Patent number: 5053513
    Abstract: A method of reducing a carbonyl containing acridine of the formula ##STR1## where n is 1, 2 or 3; X is hydrogen, loweralkyl, loweralkoxy, halogen, hydroxy, trifluoromethyl, or NR.sub.3 R.sub.4 where R.sub.3 and R.sub.4 are independently hydrogen or loweralkyl; R is hydrogen or loweralkyl and R.sub.1 is hydrogen, loweralkyl, diloweralkylaminoloweralkyl, arylloweralkyl, diarylloweralkyl, furylloweralkyl, thienylloweralkyl, oxygen-bridged arylloweralkyl, oxygen-bridged diarylloweralkyl, oxygen-bridged furylloweralkyl or oxygen-bridged thienylloweralkyl, is disclosed.
    Type: Grant
    Filed: March 29, 1990
    Date of Patent: October 1, 1991
    Assignee: Hoechst-Roussel Pharmaceuticals Incorporated
    Inventors: Thomas B. K. Lee, George E. Lee, George S. K. Wong, Donna M. Borek, Keith E. Goehring