Patents by Inventor Nicholas Greeves

Nicholas Greeves 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 cis-6,6-dimethyl-3-oxa-bicyclo(3.1.0)hexan-2-one
    Publication number: 20020161244
    Abstract: The invention provides a process for preparing an enantiomerically enriched cis-6,6-dimethyl-3-oxa-bicyclo[3.1.0]hexan-2-one by reacting a sulphonic ester of &bgr;,&bgr;-dimethyl-&ggr;-(hydroxymethyl)-&ggr;-butyrolactone with a compound of formula M(C1-6 alkoxide)y.
    Type: Application
    Filed: April 29, 2002
    Publication date: October 31, 2002
    Inventors: Daniel Levin, Jonathan Guy, Nicholas Greeves
  • Preparation of cis-6, 6-dimethyl-3-oxa-bicyclo[3.1.0]hexan-2-one
    Patent number: 6414165
    Abstract: A process for the preparation of cis-6,6-dimethyl-3-oxa-bicyclo[3.1.0]hexan-2-one which comprises either: 1) reacting a sulphonic ester of &bgr;,&bgr;-dimethyl-&ggr;-(hydroxymethyl)-&ggr;-butyrolactone with a compound of formula M(C1-6 alkoxide)y, in a suitable solvent; or 2) reacting a C1-4 alkyl ester of 4,5-epoxy-3,3-dimethylpentanoic acid with M(C1-6 alkoxide)y, in a suitable solvent; wherein M is a suitable cation and y fulfills valency requirements.
    Type: Grant
    Filed: October 16, 2000
    Date of Patent: July 2, 2002
    Assignee: Syngenta Limited
    Inventors: Daniel Levin, Jonathan Guy, Nicholas Greeves