Patents by Inventor Crystal A Achenbach-McCarthy

Crystal A Achenbach-McCarthy 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 chiral amino-nitriles
    Patent number: 7301044
    Abstract: A process and intermediates for producing 3-amino nitrites. The process involves resolving an enantiomeric mixture of chiral 3-amino nitrites in the presence of a chiral acid in a solvent system to produce a chiral 3-amino nitrile salt. The process may further comprise a recrystalizing step, wherein an enantiomerically enriched 3-amino nitrile salt is produced. The process may further comprise a salt exchanging step, wherein another acid is added to the chiral 3-amino nitrile salt or the enantiomerically enriched 3-amino nitrile salt to produce another 3-amino nitrile salt.
    Type: Grant
    Filed: September 21, 2004
    Date of Patent: November 27, 2007
    Assignee: Pfizer Inc.
    Inventors: David Robert Allen, Crystal A Achenbach-McCarthy
  • Preparation of chiral amino-nitriles
    Publication number: 20050038281
    Abstract: A process and intermediates for producing 3-amino nitrites. The process involves resolving an enantiomeric mixture of chiral 3-amino nitrites in the presence of a chiral acid in a solvent system to produce a chiral 3-amino nitrile salt. The process may further comprise a recrystalizing step, wherein an enantiomerically enriched 3-amino nitrile salt is produced. The process may further comprise a salt exchanging step, wherein another acid is added to the chiral 3-amino nitrile salt or the enantiomerically enriched 3-amino nitrile salt to produce another 3-amino nitrile salt.
    Type: Application
    Filed: September 21, 2004
    Publication date: February 17, 2005
    Inventors: David Allen, Crystal Achenbach-McCarthy
  • PREPARATION OF CHIRAL AMINO-NITRILES
    Publication number: 20040002615
    Abstract: A process and intermediates for producing 3-amino nitrites. The process involves resolving an enantiomeric mixture of chiral 3-amino nitrites in the presence of a chiral acid in a solvent system to produce a chiral 3-amino nitrile salt. The process may further comprise a recrystalizing step, wherein an enantiomerically enriched 3-amino nitrile salt is produced. The process may further comprise a salt exchanging step, wherein another acid is added to the chiral 3-amino nitrile salt or the enantiomerically enriched 3-amino nitrile salt to produce another 3-amino nitrile salt.
    Type: Application
    Filed: June 28, 2002
    Publication date: January 1, 2004
    Inventors: David Robert Allen, Crystal A. Achenbach-McCarthy
  • Processes and compositions for the production of chiral amino-nitriles
    Patent number: 6610874
    Abstract: Processes for the efficient production of chiral amino nitrites are disclosed. Generally, the processes include the esterification of the alcohol of a amino protected alcohol followed by nucleophilic substitution of the ester with a cyano group. In an exemplary embodiment the chiral amino nitrile produced is (R)-3-aminopentanenitrile.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: August 26, 2003
    Assignee: PCBU Services, Inc.
    Inventors: David Robert Allen, Crystal A. Achenbach-McCarthy
  • Processes and compositions for the production of chiral amino-nitriles
    Publication number: 20030065207
    Abstract: Processes for the efficient production of chiral amino nitrites are disclosed. Generally, the processes include the esterification of the alcohol of a amino protected alcohol followed by nucleophilic substitution of the ester with a cyano group. In an exemplary embodiment the chiral amino nitrile produced is (R)-3-aminopentanenitrile.
    Type: Application
    Filed: September 28, 2001
    Publication date: April 3, 2003
    Inventors: David Robert Allen, Crystal A. Achenbach-McCarthy