Patents by Inventor Harold C. Jarrow

Harold C. Jarrow 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).

  • Process to prepare sulfonamides
    Patent number: 7169952
    Abstract: A process for the preparation of a sulfonamide of formula (II), comprising reacting at elevated temperature an aniline of formula (I), with a sulfonating agent A of the formula R1—SO2-Z in the presence of a catalytic amount of either: (i) an amide B-1, other than N,N-dimethylformamide, or (ii) a high boiling tertiary amine B-2. Also provided in accordance with the present invention are processes for preparing sulfonamides of formula (II) by reacting an aniline of formula (I) with sulfanating agent A of the formula R1—SO2-Z in the presence of N,N-dimethylformamide, at a temperature in the range of about 120° C. to about 160° C. for about three to about seven hours.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: January 30, 2007
    Assignee: FMC Corporation
    Inventors: Leland A. Smeltz, Thomas C. Sedergran, Harold C. Jarrow
  • Process to prepare sulfonamides
    Publication number: 20030236437
    Abstract: A process for the preparation of a sulfonamide of formula (II), comprising reacting at elevated temperature an aniline of formula (I), with a sulfonating agent A of the formula R1—SO2—Z in the presence of a catalytic amount of either: (i) an amide B-1, other than N,N-dimethylformamide, or (ii) a high boiling tertiary amine B-2. Also provided in accordance with the present invention are processes for preparing sulfonamides of formula (II) by reacting an aniline of formula (I) with sulfanating agent A of the formula R1—SO2—Z in the presence of N,N-dimethylformamide, at a temperature in the range of about 120° C. to about 160° C. for about three to about seven hours. X, Y, Z, R and R1 are defined herein.
    Type: Application
    Filed: June 2, 2003
    Publication date: December 25, 2003
    Inventors: Leland A. Smeltz, Thomas C. Sedergran, Harold C. Jarrow