Patents by Inventor Ching T. Tsuei

Ching T. Tsuei 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).

  • Process for preparing N6-substituted adenosine derivatives
    Patent number: 6429315
    Abstract: This invention is directed to a process for preparing N6-substituted adenosine derivatives, to intermediates useful therefor and to methods of preparing these intermediates.
    Type: Grant
    Filed: January 21, 2000
    Date of Patent: August 6, 2002
    Assignee: Aventis Pharmaceuticals Inc.
    Inventors: Adam W. Sledeski, Luc Grondard, Matthew R. Powers, Tory H. Powner, Michael K. O'Brien, Ching T. Tsuei, Patrick Leon, Gregory G. Kubiak, Laurence Pailleres-Hubert, Benoit Viguier
  • Preparation of [1S-[1A,2B,3B,4A(S*)]]-4-[7-[[1-(3-chloro-2-thienyl)methyl propyl]amino] -3H-imidazo[4,5-B]pyridin-3-yl]-N-ethyl-2,3-dihydroxycyclopentanecarboxa mide
    Patent number: 6143894
    Abstract: This invention is directed to methods for the preparation of [1S-[1a,2b,3b,4a(S*)]]-4-[7-[[1-(3-chloro-2-thienyl) methyl]propyl]amino]-3H-imidazo[4,5-b]pyridin-3-yl]-N-ethyl-2,3-dihydroxyc yclopentanecarboxamide, methods for the preparation of intermediates thereto, and to said intermediates themselves.
    Type: Grant
    Filed: January 19, 1999
    Date of Patent: November 7, 2000
    Assignee: Aventis Pharmaceuticals Products Inc.
    Inventors: Michael K. O'Brien, Herve Garcia, Patrick Leon, Tory H. Powner, Laurence W. Reilly, Harshavadan C. Shah, Michael D. Thompson, Ching T. Tsuei, Benoit J. Vanasse, Francis L. Walther
  • Synthesis of aldehydes useful in the preparations of HMG-CoA reductase inhibitors
    Patent number: 5258544
    Abstract: Disclosed is a process for the preparation of 2-aryl-1-cyclohexene-1-carboxaldehydes from 1-arylcyclohexenes which are intermediates for trans-6-[(2-arylsubstituted cycloalkenyl and substituted cycloalkyl)alkenyl and alkyl]-3,4,5,6-tetrahydro-2H-pyran-2-ones.
    Type: Grant
    Filed: March 5, 1991
    Date of Patent: November 2, 1993
    Assignee: Rhone-Poulenc Rorer Pharmaceuticals Inc.
    Inventors: Laurence W. Reilly, Jr., Ching T. Tsuei, Walter Rodriquez, Thomas Goetzen