Patents by Inventor Julian Simon Parratt

Julian Simon Parratt 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).

  • Cyclisation process
    Patent number: 6333418
    Abstract: There is provided a process for the cyclisation of 4-amino-2-halobutyric acid to azetidine-2-carboxylic acid wherein more than 20 g of 4-amino-2-halobutyric acid is cyclised per liter of reaction mixture.
    Type: Grant
    Filed: August 31, 1999
    Date of Patent: December 25, 2001
    Assignee: AstraZeneca AB
    Inventors: Julian Simon Parratt, Stephen John Clifford Taylor
  • Process for the preparation of prostaglandin precursors
    Publication number: 20010009770
    Abstract: A propargylic alcohol, enriched in the (R)-enantiomer, has the formula 1
    Type: Application
    Filed: February 2, 2001
    Publication date: July 26, 2001
    Inventors: Martin Edward Fox, Julian Simon Parratt
  • Process for the preparation of prostaglandin precursors
    Patent number: 6214611
    Abstract: A propargylic alcohol, enriched in the (R)-enantiomer, has the formula wherein R is C1-4 alkoxy, halogen, or C1-4 alkyl optionally substituted by OH or halogen. This is prepared by the steps of: (a) enantioselective (R)-esterification of the racemic alcohol using any acyl donor and a first enzyme; (b) removal of the untreated (S)-alcohol; and (c) enantioselective hydrolysis of the (R)-ester, using a second enzyme.
    Type: Grant
    Filed: April 12, 2000
    Date of Patent: April 10, 2001
    Assignee: Chirotech Technology Limited
    Inventors: Martin Edward Fox, Julian Simon Parratt
  • Bioresolution of N-acylazetidine-2-carboxylic acids
    Patent number: 6136591
    Abstract: Process for obtaining an enantiomerically enriched N-acylazetidine-2-carboxylic acid, wherein a racemic N-acylazetidine-2-carboxylic acid ester is contacted with an enzyme that displays enantiospecificity to form enantiomerically enriched N-acylazetidine-2-carboxylic acid.
    Type: Grant
    Filed: December 15, 1998
    Date of Patent: October 24, 2000
    Assignee: Astra AB
    Inventors: Stephen John C. Taylor, Julian Simon Parratt