Patents by Inventor Donald J. Dumas

Donald J. Dumas 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: 20210051958
    Abstract: The present invention provides a method for preparing a compound of Formula B, Formula C, or Formula D: wherein Q is a 3- to 10-membered ring system containing ring members selected from carbon atoms and up to 4 heteroatoms independently selected from up to 2 O, up to 2 S, and up to 4 N, wherein up to 3 carbon atom ring members are independently selected from C(?O) and C(?S) and such ring system is optionally substituted with up to 5 substituents independently selected from RA; each RA is independently halogen, hydroxy, SF5, C(O)(C1-C8 alkyl), C(O)O(C1-C8 alkyl), N(C1-C8 alkyl)(C1-C8 alkyl), C(O)N(C1-C8 alkyl)(C1-C8 alkyl), C(?S)N(C1-C8 alkyl)(C1-C8 alkyl), SO2N(C1-C8 alkyl)(C1-C8 alkyl), OC(O)(C1-C8 alkyl), OC(O)O(C1-C8 alkyl), OC(O)N(C1-C8 alkyl)(C1-C8 alkyl), N(C1-C8 alkyl)C(O)O(C1-C8 alkyl), N(C1-C8 alkyl)C(O)N(C1-C8 alkyl)(C1-C8 alkyl), OSO2(C1-C8 alkyl), OSO2N(C1-C8 alkyl)(C1-C8 alkyl), N(C1-C8 alkyl)SO2(C1-C8 alkyl), or C1-C8 alkyl, C1-C8 haloalkyl, C2-C8 alkenyl, C2-C8 alkynyl, C3-C10 cycloalkyl
    Type: Application
    Filed: March 4, 2019
    Publication date: February 25, 2021
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: DONALD J. DUMAS, JUNBAE HONG
  • Patent number: 10155718
    Abstract: A method for preparing 3-methyl-2-nitrobenzoic acid is disclosed wherein 1,3-dimethyl-2-nitrobenzene is combined with an oxidation catalayst in the presence of an oxygen source and an initiator, provided that less than 99% of the 1,3-dimethyl-2-nitrobenzene is oxidized. A method for preparing compounds of Formula 7 and Formula 11 is also disclosed wherein the method is characterized by using 3-methyl-2-nitrobenzoic acid as prepared by the method disclosed above wherein R1 is C1-C7 alkyl, C3-C6 cycloalkyl or C4-C7 alkylcycloalkyl.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: December 18, 2018
    Assignee: FMC CORPORATION
    Inventor: Donald J. Dumas
  • Publication number: 20180072653
    Abstract: A method for preparing 3-methyl-2-nitrobenzoic acid is disclosed wherein 1,3-dimethyl-2-nitrobenzene is combined with an oxidation catalayst in the presence of an oxygen source and an initiator, provided that less than 99% of the 1,3-dimethyl-2-nitrobenzene is oxidized. A method for preparing compounds of Formula 7 and Formula 11 is also disclosed wherein the method is characterized by using 3-methyl-2-nitrobenzoic acid as prepared by the method disclosed above.
    Type: Application
    Filed: November 21, 2017
    Publication date: March 15, 2018
    Inventor: Donald J. Dumas
  • Patent number: 9828328
    Abstract: A method for preparing 3-methyl-2-nitrobenzoic acid is disclosed wherein 1,3-dimethyl-2-nitrobenzene is combined with an oxidation catalyst in the presence of an oxygen source and an initiator, provided that less than 99% of the 1,3-dimethyl-2-nitrobenzene is oxidized. A method for preparing compounds of Formula 7 and Formula 11 is also disclosed wherein the method is characterized by using 3-methyl-2-nitrobenzoic acid as prepared by the method disclosed above. wherein R1 is C1-C7 alkyl, C3-C6 cycloalkyl or C4-C7 alkylcycloalkyl.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: November 28, 2017
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Stephen Ernest Jacobson, Donald J. Dumas, Rupert Spence, Sarah May Crawford, Venkateswara Rao Surisetty
  • Publication number: 20170197907
    Abstract: A method for preparing 3-methyl-2-nitrobenzoic acid is disclosed wherein 1,3-dimethyl-2-nitrobenzene is combined with an oxidation catalyst in the presence of an oxygen source and an initiator, provided that less than 99% of the 1,3-dimethyl-2-nitrobenzene is oxidized. A method for preparing compounds of Formula 7 and Formula 11 is also disclosed wherein the method is characterized by using 3-methyl-2-nitrobenzoic acid as prepared by the method disclosed above.
    Type: Application
    Filed: May 29, 2015
    Publication date: July 13, 2017
    Inventors: Stephen Ernest Jacobson, Donald J. Dumas, Rupert Spence, Sarah May Crawford, Venkateswara Rao Surisetty
  • Patent number: 8247570
    Abstract: Disclosed is a method for preparing a compound of Formula 1 comprising contacting a compound of Formula 2 with a metal cyanide reagent, a copper(I) salt reagent, an iodide salt reagent and at least one compound of Formula 3 wherein R1 is NHR3 or OR4; R2 is CH3 or Cl; R3 is H, C1-C4 alkyl, cyclopropyl, cyclopropylcyclopropyl, cyclopropylmethyl or methylcyclopropyl; R4 is H or C1-C4 alkyl; X is Br or Cl; and R5, R6, R7, R8 and R9 are as defined in the disclosure. Also disclosed is a method for preparing a compound of Formula 4 wherein R12, R13, R14 and Z are as defined in the disclosure, using a compound of Formula 1 characterized by preparing the compound of Formula 1 by the method disclosed above or using a compound of Formula 1 prepared by the method disclosed above.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: August 21, 2012
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Donald J. Dumas, Albert Loren Casalnuovo
  • Patent number: 8242279
    Abstract: Disclosed is a method for preparing a compound of Formula 1 comprising contacting a compound of Formula 2 with a metal cyanide reagent, a copper(I) salt reagent, an iodide salt reagent and at least one compound of Formula 3 wherein R1 is NHR3 or OR4; R2 is CH3 or Cl; R3 is H, C1-C4 alkyl, cyclopropyl, cyclopropylcyclopropyl, cyclopropylmethyl or methylcyclopropyl; R4 is H or C1-C4 alkyl; X is Br or Cl; and R5, R6, R7 and R8 are as defined in the disclosure. Also disclosed is a method for preparing a compound of Formula 4 wherein R11, R12, R13 and Z are as defined in the disclosure, using a compound of Formula 1 characterized by preparing the compound of Formula 1 by the method disclosed above or using a compound of Formula 1 prepared by the method disclosed above.
    Type: Grant
    Filed: March 4, 2009
    Date of Patent: August 14, 2012
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Donald J. Dumas
  • Publication number: 20120130080
    Abstract: Disclosed is a method for preparing a compound of Formula 1 comprising contacting a compound of Formula 2 with a metal cyanide reagent, a copper(I) salt reagent, an iodide salt reagent and at least one compound of Formula 3 wherein R1 is NHR3 or OR4; R2 is CH3 or Cl; R3 is H, C1-C4 alkyl, cyclopropyl, cyclopropylcyclopropyl, cyclopropylmethyl or methylcyclopropyl; R4 is H or C1-C4 alkyl; X is Br or Cl; and R5, R6, R7, R8 and R9 are as defined in the disclosure. Also disclosed is a method for preparing a compound of Formula 4 wherein R12, R13, R14 and Z are as defined in the disclosure, using a compound of Formula 1 characterized by preparing the compound of Formula 1 by the method disclosed above or using a compound of Formula 1 prepared by the method disclosed above.
    Type: Application
    Filed: December 17, 2008
    Publication date: May 24, 2012
    Inventors: Donald J. Dumas, Albert Loren Casalnuovo
  • Patent number: 8049029
    Abstract: Disclosed is a method for preparing a compound of Formula 1 comprising contacting a compound of Formula 2 with a metal cyanide reagent, a copper(I) salt reagent, an iodide salt reagent and at least one compound of Formula 3 wherein R1 is NHR3 or OR4; R2 is CH3 or Cl; R3 is H, C1-C4 alkyl, cyclopropyl, cyclopropylcyclopropyl, cyclopropylmethyl or methylcyclopropyl; R4 is H or C1-C4 alkyl; Y is Br or Cl; X is NR13 or O; n is 0 or 1; and R5, R6, R7, R8, R9, R10, R11, R12 and R13 are as defined in the disclosure. Also disclosed is a method for preparing a compound of Formula 2 wherein Y is Br and R1 is NHR3 comprising introducing a gas containing bromine into a liquid containing a compound of Formula 4, and further disclosed is a method for preparing a compound of Formula 5 wherein R14, R15, R16 and Z are as defined in the disclosure using a compound of Formula 1 characterized by preparing the compound of Formula 1 by the method disclosed above.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: November 1, 2011
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Joerg Bruening, Gary David Annis, Donald J Dumas, Rafael Shapiro
  • Publication number: 20110003998
    Abstract: Disclosed is a method for preparing a compound of Formula 1 comprising contacting a compound of Formula 2 with a metal cyanide reagent, a copper(I) salt reagent, an iodide salt reagent and at least one compound of Formula 3 wherein R1 is NHR3 or OR4; R2 is CH3 or Cl; R3 is H, C1-C4 alkyl, cyclopropyl, cyclopropylcyclopropyl, cyclopropylmethyl or methylcyclopropyl; R4 is H or C1-C4 alkyl; X is Br or Cl; and R5, R6, R7 and R8 are as defined in the disclosure. Also disclosed is a method for preparing a compound of Formula 4 wherein R11, R12, R13 and Z are as defined in the disclosure, using a compound of Formula 1 characterized by preparing the compound of Formula 1 by the method disclosed above or using a compound of Formula 1 prepared by the method disclosed above.
    Type: Application
    Filed: March 4, 2009
    Publication date: January 6, 2011
    Inventor: Donald J. Dumas
  • Publication number: 20100280251
    Abstract: Disclosed is a method for preparing a compound of Formula 1 comprising contacting a compound of Formula 2 with a metal cyanide reagent, a copper(I) salt reagent, an iodide salt reagent and at least one compound of Formula 3 wherein R1 is NHR3 or OR4; R2 is CH3 or Cl; R3 is H, C1-C4 alkyl, cyclopropyl, cyclopropylcyclopropyl, cyclopropylmethyl or methylcyclopropyl; R4 is H or C1-C4 alkyl; Y is Br or Cl; X is NR13 or O; n is 0 or 1; and R5, R6, R7, R8, R9, R10, R11, R12 and R13 are as defined in the disclosure. Also disclosed is a method for preparing a compound of Formula 2 wherein Y is Br and R1 is NHR3 comprising introducing a gas containing bromine into a liquid containing a compound of Formula 4, and further disclosed is a method for preparing a compound of Formula 5 wherein R14, R15, R16 and Z are as defined in the disclosure using a compound of Formula 1 characterized by preparing the compound of Formula 1 by the method disclosed above.
    Type: Application
    Filed: December 18, 2007
    Publication date: November 4, 2010
    Applicant: E.I. Du Pont De Nemours and Company
    Inventors: Joerg Bruening, Gary David Annis, Martin James Currie, Donald J. Dumas, Rafael Shapiro
  • Patent number: 5235077
    Abstract: An improved process for preparing phenyl esters of alkanoyloxyacetic acids in which phenyl chloroacetate is reacted with the salt of a carboxylic acid.
    Type: Grant
    Filed: March 25, 1991
    Date of Patent: August 10, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Bijan Amini, Donald J. Dumas, Ronald A. Fong, George C. Sonnichsen
  • Patent number: 5153341
    Abstract: An improved process for preparing alkanoyloxyacetyloxybenzenesulfonate salts in which phenyl esters of alkanoyloxyacetic acids (alkanoyloxyacetyloxybenzenes) are sulfonated to yield novel alkanoyloxyacetyloxybenzenesulfonic acids which, on neutralization, yield the corresponding alkanoyloxyacetyloxybenzenesulfonate salts.
    Type: Grant
    Filed: March 25, 1991
    Date of Patent: October 6, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Bijan Amini, Donald J. Dumas, George C. Sonnichsen
  • Patent number: 5069828
    Abstract: An improved process for preparing benzenesulfonate salts, such as 4-nonanoyloxybenzenesulfonic acid, sodium salt, from an appropriately substituted acid chloride or chloroformate and a hydroxybenzenesulfonic acid in which the reaction is conducted in the presence of a phase transfer catalyst selected from quaternary ammonium and quaternary phosphonium salts.
    Type: Grant
    Filed: June 6, 1989
    Date of Patent: December 3, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Donald J. Dumas, Vinayakam Subramanyam
  • Patent number: 4985180
    Abstract: Phenyl esters of substituted acids are prepared by a two-step process in which a phenol derivative is first treated with an acid halide to yield a phenyl ester intermediate, and the intermediate is reacted with an appropriate nucleophile.
    Type: Grant
    Filed: June 6, 1989
    Date of Patent: January 15, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Harold E. Bellis, Donald J. Dumas, George C. Sonnichsen, Vinayakam Subramanyam
  • Patent number: 4956005
    Abstract: Ortho-Sulfonamide benzenesulfonylureas, such as N-cyclopropyl-N'-[(4,6-dimethoxypyrimidin-2-yl)aminocarbonyl]-1,2-benzened isulfonamide, are useful as pre-emergent and post-emergent herbicides.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: September 11, 1990
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Donald J. Dumas
  • Patent number: 4897108
    Abstract: The invention relates to certain sulfonylurea compounds having an ester group ortho to the sulfonylurea linkage which have been found to be excellent preemergent and postemergent herbicides or plant growth regulators.
    Type: Grant
    Filed: June 24, 1988
    Date of Patent: January 30, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Donald J. Dumas
  • Patent number: 4892575
    Abstract: Herbicidal sulfonamides such as 2-[[[4-(methylamino)-6-(2, 2,2-trifluoroethoxy)-1,3,5-triazin-2-yl]-aminocarbonyl]aminosulfonyl]benzo ic acid, methyl ester are useful as herbicides and plant growth regulants.
    Type: Grant
    Filed: February 19, 1988
    Date of Patent: January 9, 1990
    Assignee: E. I. Du Pont De Nemours and Company
    Inventors: Martha M. Bolinski, Donald J. Dumas
  • Patent number: 4878937
    Abstract: This invention relates to herbicidally active sulfonylurea compounds, agriculturally suitable compositions thereof and their method of use as herbicides or plant growth regulants.
    Type: Grant
    Filed: February 12, 1988
    Date of Patent: November 7, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventors: Donald J. Dumas, Marcus P. Moon
  • Patent number: H1950
    Abstract: Oxadiazines of formula I, wherein R1 is F, Cl or fluoroalkoxy and R2 is alkyl, are prepared by reacting hydrazine derivatives of formula II with a dialkoxymethane in the presence of a protic acid catalyst in an inert solvent under conditions which allow for the prompt removal of the alcohol by-product by distillation. The reaction can be combined with the preparation of the hydrazines derivatives II from the corresponding ketones and hydrazines NH2-NHR3 in the presence of the same protic acid catalyst and an inert solvent. Oxadiazines I are useful as intermediates in the preparation of arthropodicidal agents.
    Type: Grant
    Filed: February 3, 1999
    Date of Patent: March 6, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Donald J. Dumas