Patents by Inventor Jack Vass

Jack Vass 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).

  • Processes for the preparation of azoxystrobin using dabco as a catalyst and novel intermediates used in the processes
    Patent number: 8124761
    Abstract: The present invention relates, inter alia, to a process for preparing a compound of formula (I): which comprises either (a) reacting a compound of formula (II): with 2-cyanophenyl, or a salt thereof, in the presence of between 0.1 and 2 mol % of 1,4-diazabicyclo[2.2.2]octane, or (b) reacting a compound of the formula (III): with a compound of the formula (IV): in the presence of between 0.1 and 2 mol % of 1,4-diazabicyclo[2.2.2]octane; where W is the methyl (E)-2-(3-methoxy)acrylate group C(CO2CH3)?CHOCH3 or the methyl 2-(3,3-dimethoxy)propanoate group C(CO2CH3)CH(OCH3)2, or a mixture of the two groups. In addition, the present invention relates to a novel precursors of the compound of formula (I) and methods for making them.
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: February 28, 2012
    Assignee: Syngenta Limited
    Inventors: Alan John Whitton, Ewan Campbell Boyd, Jack Vass
  • Processes For the Preparation of Azoxystrobin Using Dabco as a Catalyst and Novel Intermediates Used in the Processes
    Publication number: 20080214587
    Abstract: The present invention relates, inter alia, to a process for preparing a compound of formula (I): which comprises either (a) reacting a compound of formula (II): with 2-cyanophenyl, or a salt thereof, in the presence of between 0.1 and 2 mol % of 1,4-diazabicyclo[2.2.2]octane, or (b) reacting a compound of the formula (III): with a compound of the formula (IV): in the presence of between 0.1 and 2 mol % of 1,4-diazabicyclo[2.2.2]octane; where W is the methyl (E)-2-(3-methoxy)acrylate group C(CO2CH3)?CHOCH3 or the methyl 2-(3,3-dimethoxy)propanoate group C(CO2CH3)CH(OCH3)2, or a mixture of the two groups. In addition, the present invention relates to a novel precursors of the compound of formula (I) and methods for making them.
    Type: Application
    Filed: April 13, 2006
    Publication date: September 4, 2008
    Applicant: SYNGENTA CROP PROTECTION, INC.
    Inventors: Alan John Whitton, Ewan Campbell Boyd, Jack Vass