Patents by Inventor Bogdan K. Wilk

Bogdan K. Wilk 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).

  • Methods for minimizing thioamide impurities
    Patent number: 7572824
    Abstract: Methods for minimizing the formation of thioamide compounds using decoy agents during reactions, such as thionations of carbonyl compounds containing nitrile groups, and the products thereby are provided.
    Type: Grant
    Filed: November 16, 2007
    Date of Patent: August 11, 2009
    Assignee: Wyeth
    Inventor: Bogdan K. Wilk
  • Methods for the preparation of {2-[(8,9)-dioxo-2,6-diaza-bicyclo[5.2.0]-non-1(7)-en-2-yl]ethyl}phosphonic acid and esters thereof
    Patent number: 7345032
    Abstract: The present invention provides methods for the preparation of {2-[(8,9)-dioxo-2,6-diaza-bicyclo[5.2.0]-non-1(7)-en-2-yl]ethyl}phosphonic acid, and esters thereof.
    Type: Grant
    Filed: October 20, 2004
    Date of Patent: March 18, 2008
    Assignee: Wyeth
    Inventors: Bogdan K. Wilk, Galina Vid, Weiguo Liu, Xinxu Shi
  • Process for the preparation of 2-[alkyl(aryl)]sulfonylbenzene-sulfonyl chlorides and their intermediates
    Patent number: 6642416
    Abstract: A process for the preparation of 2-[alkyl(aryl)]sulfonylbenzene sulfonyl chlorides of the following formula is provided: in which R is alkyl or aryl substituted at the ortho or meta positions with alkyl, aryl, NHAc or alkoxy, comprising the steps of: a) reacting 2-chloronitrobenzene, 2-fluoronitrobenzene or 2-bromonitrobenzene with a compound of the following formula: RSO2−M+ wherein R is defined above; and M is sodium, potassium, lithium, ammonium or quaternary ammonium, in a polar aprotic solvent at a temperature of about 50 to 190° C.; b) reacting the material prepared in step (a) with hydrogen at a pressure of about 20 to about 60 psi in a polar aprotic solvent at a temperature of about 20 to about 60° C.
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: November 4, 2003
    Assignee: Wyeth
    Inventors: Lalitha Krishnan, Bogdan K. Wilk, Jennifer P. Varriano
  • Process for the preparation of 2-[alkyl(aryl)]sulfonylbenzene-sulfonyl chlorides and their intermediates
    Publication number: 20030109750
    Abstract: A process for the preparation of 2-[alkyl(aryl)]sulfonylbenzene sulfonyl chlorides of the following formula is provided: 1
    Type: Application
    Filed: October 31, 2002
    Publication date: June 12, 2003
    Applicant: Wyeth
    Inventors: Jennifer P. Varriano, Lalitha Krishnan, Bogdan K. Wilk