Patents by Inventor Werner Pfaff

Werner Pfaff 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).

  • 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
  • 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
  • Patent number: 6124493
    Abstract: There is described a process for the preparation of a compound of formula I ##STR1## in which process: a) a compound of formula II ##STR2## is reacted with an organolithium compound of formula IIILi--R.sub.7 (III)b) the resulting lithium complex is reacted with a compound of formula IVY.sub.1 --CO--CO--Y.sub.1 IVto form a compound of formula V ##STR3## c) that compound is, in either order, c1) oximated with O-methylhydroxylamine; or oximated with hydroxylamine and then methylated or fluoromethylated or difluoromethylated;c2) reacted with a chloroformic acid ester.X, m, Y, R.sub.1 to R.sub.3 and R.sub.7 are as defined in the description.
    Type: Grant
    Filed: October 19, 1998
    Date of Patent: September 26, 2000
    Assignee: Novartis Finance Corporation
    Inventors: Jean-Marie Assercq, Hans-Dieter Schneider, Albert Pfiffner, Werner Pfaff
  • Patent number: 5756811
    Abstract: There is described a process for the preparation of a compound of formula I ##STR1## in which process: a) a compound of formula II ##STR2## is reacted with an organolithium compound of formula IIILi--R.sub.7 (III)b) the resulting lithium complex is reacted with a compound of formula IVY.sub.1 --CO--CO--Y.sub.1 IVto form a compound of formula V ##STR3## c) that compound is, in either order, c1) oximated with O-methylhydroxylamine; or oximated with hydroxylamine and then methylated or fluoromethylated or difluoromethylated;c2) reacted with a chloroformic acid ester.X, m, Y, R.sub.1 to R.sub.3 and R.sub.7 are as defined in the description.
    Type: Grant
    Filed: December 30, 1996
    Date of Patent: May 26, 1998
    Assignee: Novartis Corporation
    Inventors: Jean-Marie Assercq, Hans-Dieter Schneider, Albert Pfiffner, Werner Pfaff
  • Patent number: 4339436
    Abstract: Inhibitor for the glycoside hydrolases of the digestive tract, more particularly of the pancreatic .alpha.-amylase produced by fermentation of the specific microorganism Streptomyces tendae, strain 4158, as well as the variants and mutants thereof, the microbe strain per se and processes for the isolation of the inhibitor and for its purification.
    Type: Grant
    Filed: February 23, 1981
    Date of Patent: July 13, 1982
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Volker Oeding, Werner Pfaff, Laszlo Vertesy, Hans-Ludwig Weidenmuller
  • Patent number: 4282318
    Abstract: Inhibitor for the glycoside hydrolases of the digestive tract, more particularly of the pancreatic .alpha.-amylase produced by fermentation of the specific microorganism Streptomyces tendae, strain 4158, as well as the variants and mutants thereof, the microbe strain per se and processes for the isolation of the inhibitor and for its purification.
    Type: Grant
    Filed: January 2, 1980
    Date of Patent: August 4, 1981
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Volker Oeding, Werner Pfaff, Laszlo Vertesy, Hans-Ludwig Weidenmuller
  • Patent number: 4226764
    Abstract: Inhibitor for the glycoside hydrolases of the digestive tract, more particularly of the pancreatic .alpha.-amylase produced by fermentation of the specific microorganism Streptomyces tendae, strain 4158, as well as the variants and mutants thereof, the microbe strain per se and processes for the isolation of the inhibitor and for its purification.
    Type: Grant
    Filed: January 17, 1978
    Date of Patent: October 7, 1980
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Volker Oeding, Werner Pfaff, Laszlo Vertesy, Hans-Ludwig Weidenmuller
  • Patent number: 4221815
    Abstract: Acyl-aminoalkyl-benzoic acid and derivates thereof show a blood sugar lowering effect upon oral administration and can be used as orally applicable hypoglycemiants.
    Type: Grant
    Filed: January 2, 1976
    Date of Patent: September 9, 1980
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Rudi Weyer, Volker Hitzel, Karl Geisen, Werner Pfaff
  • Patent number: 4181658
    Abstract: Benzoic acid derivatives of the formula ##STR1## wherein T is hydrogen or halogen, W is a carboxyl group, an ester or salt thereof; X is ##STR2## wherein R.sub.1 is alkyl having from 2 to 8 carbon atoms, aralkyl or phenyl, cycloalkyl, cycloalkylalkyl or alkylcycloalkyl; R.sub.2 is hydrogen or halogen, R.sub.3 is alkyl having from 5 to 8 carbon atoms, aralkyl or phenyl, or cycloalkyl having from 5 to 8 carbon atoms; R.sub.4 is hydrogen or alkyl; Y is a single chemical bond or a hydrocarbon chain having from 1 to 3 carbon atoms; and Z is hydrogen, halogen, alkyl, alkoxy, alkoxyalkoxy or alkenyloxy, have a blood sugar lowering effect and can be used for the treatment of Diabetes mellitus.
    Type: Grant
    Filed: February 16, 1978
    Date of Patent: January 1, 1980
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Volker Hitzel, Rudi Weyer, Karl Geisen, Werner Pfaff
  • Patent number: 4157395
    Abstract: Benzenesulfonyl ureas of the formula ##STR1## in which R, R.sup.1, X, X.sup.1 and Y have the defined meanings, and the salts thereof, process for preparing these compounds, pharmaceutical preparations containing them and their use for lowering the blood sugar level.
    Type: Grant
    Filed: May 8, 1978
    Date of Patent: June 5, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Volker Hitzel, Rudi Weyer, Werner Pfaff, Karl Geisen
  • Patent number: 4132795
    Abstract: Benzenesulfonyl ureas of the formula ##STR1## in which R, R.sup.1, R.sup.2, R.sup.3, R.sup.4 and Y have the defined meanings, and the salts thereof, process for preparing them, pharmaceutical preparations containing them and their use for lowering the blood sugar level.
    Type: Grant
    Filed: May 16, 1977
    Date of Patent: January 2, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Volker Hitzel, Rudi Weyer, Werner Pfaff, Karl Geisen
  • Patent number: 3998968
    Abstract: N-acylaminoalkyl-benzenesulfonyl-N'-methyl ureas, especially those of the general formula ##STR1## in which R is C.sub.1-- C.sub.4 --alkyl or a phenyl radical substituted in 2-position by alkoxy of 1 to 4 carbon atoms, phenoxy or dimethylamino and in 5-position by H, CH.sub.3, Cl or Br, their manufacture and their use as oral antidiabetics.
    Type: Grant
    Filed: March 19, 1975
    Date of Patent: December 21, 1976
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Volker Hitzel, Werner Pfaff, Rudi Weyer, Helmut Weber