Patents by Inventor Albert Louis Anna Willemsens

Albert Louis Anna Willemsens 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).

  • Resolution of (±)-methyl phenyl[4-[4-[[[4?(trifluoromethyl)-2-biphenylyl]carbonyl]amino]Phenyl]-1-piperidinyl]acetate
    Patent number: 8461341
    Abstract: The present invention relates to a resolution process of (±)-methyl phenyl[4-[4-[[[4?-(trifluoromethyl)-2-biphenylyl]carbonyl]amino]phenyl]-1-piperidinyl]acetate to isolate the MTP (microsomal triglyceride transfer protein) inhibitor methyl (2S)-phenyl[4-[4-[[[4?-(trifluoromethyl)-2-biphenylyl]carbonyl]amino]phenyl]-1-piperidinyl]acetate and an epimerisation procedure for racemizing methyl (2R)-phenyl[4-[4-[[[4?-(trifluoromethyl)-2-biphenylyl]carbonyl]amino]phenyl]-1-piperidinyl]acetate.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: June 11, 2013
    Assignee: Janssen Pharmaceutica NV
    Inventors: Alex Herman Copmans, Jérôme Albert Joseph Hoet, Albert Louis Anna Willemsens, Wouter Louis J Couck, Joannes Petrus Van Dun
  • Process for preparing enantiomerically pure 6-{4-chlorophenyl) (1 H-1,2,4-triazol-1-YL) methyl}-1-methyl-1 H-benzotriazole
    Patent number: 5746840
    Abstract: A process for preparing (+)-6-?(4-chlorophenyl)(1H- 1,2,4-triazol-1-yl)methyl!-1-methyl-1H-benzotriazole comprising the resolution of (.+-.)-6-!(4-chlorophenyl)-hydrazinomethyl)-1-methyl-1H-benzotriazole and converting the appropriate enantiomerically pure hydrazine intermediate into (+)-6-?(4-chlorophenyl)(H- 1,2,4-triazol-1-yl)methyl!-1-methyl-1H-benzotriazole.
    Type: Grant
    Filed: March 28, 1997
    Date of Patent: May 5, 1998
    Assignee: Janssen Pharmaceutica, N.V.
    Inventors: Albert Louis Anna Willemsens, Walter Louis Antoine Verstappen, Alex Herman Copmans, Anna Maria Jozefa Vandendriessche, Alfons Gaston Maria De Knaep, Marc Gaston Venet
  • Process for preparing enantiomerically pure 6-[(4-chlorophenyl) (1H-1,2,4-triazol-1-yl) methyl]-1-methyl-1H-benzotrizole
    Patent number: 5663354
    Abstract: A process for preparing (+)-6-[(4-chlorophenyl)(1H-1,2,4-triazol-1-yl)methyl]-1-methyl-1H-benzotri azole comprising the resolution of (.+-.)-6-[(4-chlorophenyl)-hydrazinomethyl)-1-methyl-1H-benzotriazole and converting the appropriate enantiomerically pure hydrazine intermediate into (+)-6-[(4-chlorophenyl)(1 H-1,2,4-triazol-1-yl)methyl]-1-methyl-1H-benzotriazole.
    Type: Grant
    Filed: April 18, 1995
    Date of Patent: September 2, 1997
    Assignee: Janssen Pharmaceutica, N.V.
    Inventors: Albert Louis Anna Willemsens, Walter Louis Antoine Verstappen, Alex Herman Copmans, Anna Maria Jozefa Vandendriessche, Alfons Gaston Maria De Knaep, Marc Gaston Venet