Patents by Inventor David Anthony Jackson

David Anthony Jackson 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).

  • Publication number: 20150376135
    Abstract: The present invention relates to a process for the preparation of bisdihaloalkyl pyrazoles of formula (V) starting from diketones and acylhalides reacted with a Lewis acid, and a subsequent reaction with a substituted hydrazine.
    Type: Application
    Filed: February 7, 2014
    Publication date: December 31, 2015
    Applicant: Syngenta Participations AG
    Inventors: Anup JAWALEKAR, Helmars SMITS, Laura QUARANTA, Sitaram PAL, David Anthony JACKSON
  • Patent number: 8785657
    Abstract: The present invention relates to novel processes for the production of compounds of formula wherein Hal and Hal? are independently selected from Cl and F, and R1 is selected from Cl, F and H.
    Type: Grant
    Filed: September 17, 2012
    Date of Patent: July 22, 2014
    Assignee: Syngenta Crop Protection LLC
    Inventors: Martin Charles Bowden, Brian David Gott, David Anthony Jackson, Iacob Eremia Gutu
  • Patent number: 8552222
    Abstract: The present invention relates to a continuous process for producing a haloalkenone ether of the Formula (I) wherein R1 is C1-C6 haloalkyl, R2 is a C1-C6 alkyl or phenyl, the process comprising:—(i) reacting, in a first continuous stirred tank reactor comprising a solvent, a halide of Formula (II) wherein R1 is as previously defined and R3 is halogen, with a vinyl ether of Formula (III) wherein R2 is as previously defined, to form an intermediate compound of Formula (IV), wherein the concentration of the vinyl ether of Formula (III) in the reaction mass is 15% or less w/w; and (ii) transferring the reaction mass from the first continuous stirred tank reactor into a subsequent continuous stirred tank reactor, wherein the conditions within the subsequent reactor permit the elimination of hydrogen halide (HR3) from the intermediate compound of Formula (IV) to provide the haloalkenone ether of Formula (I).
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: October 8, 2013
    Assignee: Syngenta Crop Protection LLC
    Inventors: David Anthony Jackson, Florian Schleth, Devender Singh Negi, Werner Pfaff
  • Patent number: 8501993
    Abstract: The invention relates to a process for the preparation of intermediates useful in the preparation of fungicidally active phenylpropargylether derivatives. The process involves coupling of carboxylic acid with an amine in (a) the absence of a catalyst; (b) the presence of a boronic acid catalyst.
    Type: Grant
    Filed: May 11, 2009
    Date of Patent: August 6, 2013
    Assignee: Syngenta Limited
    Inventors: Martin Charles Bowden, David Anthony Jackson, Alexandre Christian Saint-Dizier, David Drouard
  • Publication number: 20120289707
    Abstract: The invention relates to a process for the preparation of fungicidally active compounds such as tricyclic amine derivatives (I). The process involves coupling of a carboxylic acid e.g. a compound of formula (II) with an aniline, e.g. a compound of formula (III) in the presence of a boronic acid catalyst or an antimony catalyst wherein R1, R2, R3, R4, R5, R6, R7, X, Y and Het are defined in the specification.
    Type: Application
    Filed: July 24, 2012
    Publication date: November 15, 2012
    Applicant: SYNGENTA CROP PROTECTION, LLC
    Inventors: Martin Charles Bowden, David Anthony Jackson, Alexandre Christian Saint-Dizier, George Robert Hodges
  • Patent number: 8269020
    Abstract: The present invention relates to novel processes for the production of compounds of formula (I) wherein Hal and Hal? are independently selected from Cl and F, and R1 is selected from Cl, F and H.
    Type: Grant
    Filed: June 16, 2008
    Date of Patent: September 18, 2012
    Assignee: Syngenta Crop Protection LLC
    Inventors: Martin Charles Bowden, Brian David Gott, Iacob Eremia Gutu, David Anthony Jackson
  • Patent number: 8227619
    Abstract: The invention relates to a process for the preparation of fungicidally active compounds such as tricyclic amine derivatives (I). The process involves coupling of a carboxylic 5 acid e.g. a compound of formula (II) with an aniline, e.g. a compound of formula (III) in the presence of a boronic acid catalystor an antimony catalyst (II)(III)(I) wherein R1, R2, R3, R4, R5, R6, R7, X, Y and Het are defined in the specification.
    Type: Grant
    Filed: May 11, 2009
    Date of Patent: July 24, 2012
    Assignee: Syngenta Limited
    Inventors: Martin Charles Bowden, David Anthony Jackson, Alexandre Christian Saint-Dizier, George Robert Hodges
  • Publication number: 20120095265
    Abstract: The present invention relates to a continuous process for producing a haloalkenone ether of the Formula (I) wherein R1 is C1-C6 haloalkyl, R2 is a C1-C6 alkyl or phenyl, the process comprising:—(i) reacting, in a first continuous stirred tank reactor comprising a solvent, a halide of Formula (II) wherein R1 is as previously defined and R3 is halogen, with a vinyl ether of Formula (III) wherein R2 is as previously defined, to form an intermediate compound of Formula (IV), wherein the concentration of the vinyl ether of Formula (III) in the reaction mass is 15% or less w/w; and (ii) transferring the reaction mass from the first continuous stirred tank reactor into a subsequent continuous stirred tank reactor, wherein the conditions within the subsequent reactor permit the elimination of hydrogen halide (HR3) from the intermediate compound of Formula (IV) to provide the haloalkenone ether of Formula (I).
    Type: Application
    Filed: March 2, 2010
    Publication date: April 19, 2012
    Applicant: SYNGENTA CROP PROTECTION, LLC
    Inventors: David Anthony Jackson, Florian Schleth, Devender Singh Negi, Werner Pfaff
  • Publication number: 20110263889
    Abstract: The invention relates to a process for the preparation of synthetic pyrethroid insecticides. The process involves coupling of carboxylic acid (IV) with an alcohol (V) in the presence of a catalyst wherein R1, R2, R3 and Ar are defined in the specification.
    Type: Application
    Filed: May 11, 2009
    Publication date: October 27, 2011
    Applicant: SYNGENTA CROP PROTECTION, INC.
    Inventors: Martin Charles Bowden, David Anthony Jackson, Alexandre Christian Saint-Dizier
  • Publication number: 20110178310
    Abstract: The invention relates to a process for the preparation of fungicidally active compounds such as tricyclic amine derivatives (I). The process involves coupling of a carboxylic 5 acid e.g. a compound of formula (II) with an aniline, e.g. a compound of formula (III) in the presence of a boronic acid catalystor an antimony catalyst (II)(III)(I) wherein R1, R2, R3, R4, R5, R6, R7, X, Y and Het are defined in the specification.
    Type: Application
    Filed: May 11, 2009
    Publication date: July 21, 2011
    Applicant: SYNGENTA CROP PROTECTION, INC.
    Inventors: Martin Charles Bowden, David Anthony Jackson, Alexandre Christian Saint-Dizier, George Robert Hodges
  • Publication number: 20110071315
    Abstract: The invention relates to a process for the preparation of intermediates useful in the preparation of fungicidally active phenylpropargylether derivatives. The process involves coupling of carboxylic acid with an amine in (a) the absence of a catalyst; (b) the presence of a boronic acid catalyst.
    Type: Application
    Filed: May 11, 2009
    Publication date: March 24, 2011
    Applicant: SYNGENTA CROP PROTECTION, INC.
    Inventors: Martin Charles Bowden, David Anthony Jackson, Alexandre Christian Saint-Dizier, David Drouard
  • Patent number: 7893270
    Abstract: The present invention relates to a process for the preparation of compounds of formula (I), wherein the substituents are as defined in claim 1, by reacting a compound of formula (II), with a bromine or chlorine source to form a compound of formula (III), wherein X is chlorine or bromine; reacting that compound with water to form the compound of formula (IV), converting that compound, using a compound of formula (V), wherein M+ is the hydrogen cation or an alkali metal ion, alkaline earth metal ion or ammonium ion, into the compound of formula (VI), and treating that compound with a cyanide source in the presence of a base.
    Type: Grant
    Filed: April 29, 2005
    Date of Patent: February 22, 2011
    Assignee: Syngenta Crop Protection, Inc.
    Inventors: David Anthony Jackson, Andrew Edmunds, Martin Charles Bowden, Ben Brockbank
  • Publication number: 20100256390
    Abstract: The present invention relates to novel processes for the production of compounds of formula (I) wherein Hal and Hal? are independently Cl or F, and R1 is H, Cl or F.
    Type: Application
    Filed: June 16, 2008
    Publication date: October 7, 2010
    Applicants: SYNGENTA CROP PROTECTION, INC., SYNGENTA LIMITED
    Inventors: Martin Charles Bowden, Brian David Gott, David Anthony Jackson
  • Publication number: 20100240907
    Abstract: The present invention relates to novel processes for the production of compounds of formula (I) wherein Hal and Hal? are independently selected from Cl and F, and R1 is selected from Cl, F and H.
    Type: Application
    Filed: June 16, 2008
    Publication date: September 23, 2010
    Applicant: SYNGENTA CROP PROTECTION, INC.
    Inventors: Martin Charles Bowden, Brian David Gott, David Anthony Jackson, Lacob Gutsu
  • Patent number: 7501544
    Abstract: The present invention relates to a process for the preparation of compounds of formula (I), wherein the substituents are as defined in claim 1, by reacting a compound of formula (II), either with a chlorination or bromination agent or with a compound of formula (III) CI—SO2R9, R9 being C1-C4alkyl, C1-C4haloalkyl, phenyl or C1-C4alkyl-substituted phenyl, to form the compound of formula (IV), reacting the compound of formula (IV) with a compound of formula (V) M+-O?—C(O)—Y wherein Y is as defined above and M+ is the hydrogen cation or an alkali metal ion, alkaline earth metal ion or ammonium ion, to form the compound of formula (VI) and treating that compound with a cyanide source in the presence of a base.
    Type: Grant
    Filed: April 29, 2005
    Date of Patent: March 10, 2009
    Assignees: Syngenta Crop Protection, Inc., Syngenta Limited
    Inventors: David Anthony Jackson, Andrew Edmunds, Martin Charles Bowden, Ben Brockbank
  • Patent number: 7488824
    Abstract: The present invention relates to a process for the preparation of compounds of formula (I) wherein the substituents are as defined in claim 1, by reaction of a compound of formula (II) wherein R3 is C1-C8alkyl or C3-C6cycloalkyl and R4 and R05 are as defined for formula (I), with a compound of formula (III) wherein R, R1, R2 and X1, are as defined for formula (I) in claim 1, in an inert solvent in the presence of a proton source.
    Type: Grant
    Filed: March 5, 2004
    Date of Patent: February 10, 2009
    Assignee: Syngenta Crop Protection, Inc.
    Inventors: David Anthony Jackson, Martin Charles Bowden
  • Publication number: 20080139816
    Abstract: The present invention relates to a process for the preparation of compounds of formula (I), wherein the substituents are as defined in claim 1, by reacting a compound of formula (II), with a bromine or chlorine source to form a compound of formula (III), wherein X is chlorine or bromine; reacting that compound with water to form the compound of formula (IV), converting that compound, using a compound of formula (V), wherein M+ is the hydrogen cation or an alkali metal ion, alkaline earth metal ion or ammonium ion, into the compound of formula (VI), and treating that compound with a cyanide source in the presence of a base.
    Type: Application
    Filed: April 29, 2005
    Publication date: June 12, 2008
    Applicant: SYNGENTA CROP PROTECTION, INC.
    Inventors: David Anthony Jackson, Andrew Edmunds, Martin Charles Bowden, Ben Brockbank
  • Patent number: 7244737
    Abstract: The present invention relates to a compound of the general formula: wherein R1 is a 4-pyrimidinyl ring substituted at the 6-position by halo, hydroxy, 2-cyanophenoxy, 2,6-difluorophenoxy, 2-nitrophenoxy or 2-thiocarboxamidophenoxy and wherein R2 is any group which can be transesterified to form a methyl ester. The present invention is also directed to a process of preparing said compound.
    Type: Grant
    Filed: June 20, 2006
    Date of Patent: July 17, 2007
    Assignee: Syngenta Limited
    Inventors: David Anthony Jackson, James Peter Muxworthy, Mark Robert Sykes
  • Patent number: 7138548
    Abstract: A process for the preparation of a compound of formula (I): wherein Ar represents an optionally substituted aromatic carbocycle or heterocycle, and R1 and R2 independently represent hydrogen, C1-10 alkyl, C(O)C1-10 alkyl or optionally substituted aryl provided that R1 and R2 are not both hydrogen which process comprises reacting together a compound of formula (II): Ar—X??(II) wherein Ar is as defined in relation to formula (I) and X represents a leaving group with a a compound of formula (III) wherein R1 and R2 are as defined in relation to formula (I) under aqueous conditions in the presence of a Pd (II) salt, a ligand and a Group I or Group II metal hydroxide base at a pH greater than 7. Compounds of formula (I) may be hydrolysed to the corresponding hydrazine.
    Type: Grant
    Filed: October 2, 2002
    Date of Patent: November 21, 2006
    Assignee: Avecia Limited
    Inventors: Andrew John Blacker, David Dodman, David Anthony Jackson, Jan Michael Fielden, John Heathcote Atherton
  • Patent number: 7084272
    Abstract: A process for the preparation of a compound of the general formula (I): wherein R1 is a 4-pyrimidinyl ring substituted at the 6-position by halo, hydroxy, 2-cyanophenoxy, 2,6-difluorophenoxy, 2-nitrophenoxy or 2-thiocarboxamidophenoxy and R2 is any group which can be transesterified to form a methyl ester, which comprises treating a compound of general formula (II): wherein R1 and R2 have the meanings given above, with a formylating agent and subsequently treating the formylated product with a methylating agent
    Type: Grant
    Filed: May 3, 2002
    Date of Patent: August 1, 2006
    Assignee: Syngenta Limited
    Inventors: David Anthony Jackson, James Peter Muxworthy, Mark Robert Sykes