Patents by Inventor Lorraine M. Kroposki

Lorraine M. Kroposki 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 for preparing phosphorothioates and phenylphosphonothioates
    Patent number: 4147866
    Abstract: Quaternary ammonium salts and sterically unhindered, nucleophilic, tertiary amines are novel cocatalysts which are used in the process of reacting an alkali metal phenate, pyridinate or pyrimidinate with an O,O-dialkylphosphorochloridothioate or O-alkyl phenylphosphonochloridothioate to produce the corresponding phosphorothioates and phenylphosphonothioates. The process is conducted under alkaline conditions in a liquid reaction medium.
    Type: Grant
    Filed: February 22, 1978
    Date of Patent: April 3, 1979
    Assignee: The Dow Chemical Company
    Inventors: Harold H. Freedman, Stanley D. McGregor, Masao Yoshimine, Lorraine M. Kroposki
  • Process for preparing phosphorothioates and phenylphosphonothioates
    Patent number: 4096210
    Abstract: Quaternary ammonium salts and sterically unhindered, nucleophilic, tertiary amines are novel cocatalysts which are used in the process of reacting an alkali metal phenate, pyridinate or pyrimidinate with an O,O-dialkylphosphorochloridothioate or O-alkyl phenylphosphonochloridothioate to produce the corresponding phosphorothioates and phenylphosphonothioates. The process is conducted under alkaline conditions in a liquid reaction medium.
    Type: Grant
    Filed: November 15, 1976
    Date of Patent: June 20, 1978
    Assignee: The Dow Chemical Company
    Inventors: Harold H. Freedman, Stanley D. McGregor, Masao Yoshimine, Lorraine M. Kroposki
  • Process for preparing phosphorothioates and phenylphosphonothioates
    Patent number: 4094873
    Abstract: Mixtures of (1) a quaternary ammonium salt(s) and (2) a diazole are novel catalysts in the process of reacting an alkali metal phenate, pyridinate or pyrimidinate with an O,O-dialkyl phosphorochloridothioate or O-alkyl phenylphosphonochloridothioate to produce the corresponding title compounds. The process is conducted under alkaline conditions in a liquid reaction medium. As an example, O,O-diethyl O-(3,5,6-trichloro-2-pyridyl)phosphorothioate is prepared in excellent yields and purity by reacting sodium 3,5,6-trichloro-2-pyridinate with O,O-diethyl phosphorochloridothioate in a stirred methylene chloride-water reaction medium in the presence of a catalytic amount of benzyltriethylammonium chloride and 1-methylimidazole.
    Type: Grant
    Filed: January 21, 1977
    Date of Patent: June 13, 1978
    Assignee: The Dow Chemical Company
    Inventors: Lorraine M. Kroposki, Masao Yoshimine, Harold H. Freedman
  • Process for preparing phosphorothioates and phenylphosphonothioates
    Patent number: 4092312
    Abstract: Mixtures of (1) a quaternary ammonium salt(s) and (2) 1,4-diazabicyclo[2.2.2]octane are novel catalysts in the process of reacting an alkali metal phenate, pyridinate or pyrimidinate with an O,O-dialkyl phosphorochloridothioate or O-alkyl phenylphosphonochloridothioate to produce the corresponding phosphorothioates and phenylphosphonothioates. The process is conducted under alkaline conditions in a liquid reaction medium. As an example, O,O-diethyl O-(3,5,6-trichloro-2-pyridyl)phosphorothioate is prepared in excellent yields and purity by reacting sodium 3,5,6-trichloropyridinate with O,O-diethyl phosphorochloridothioate in a stirred methylene chloride-water reaction medium in the presence of a catalytic amount of benzyltriethylammonium chloride and 1,4-diazabicyclo[2.2.2]octane.
    Type: Grant
    Filed: January 21, 1977
    Date of Patent: May 30, 1978
    Assignee: The Dow Chemical Company
    Inventors: Lorraine M. Kroposki, Masao Yoshimine
  • Process for preparing phosphorothioates and phenylphosphonothioates
    Patent number: 4028439
    Abstract: Mixtures of (1) a quaternary ammonium salt(s) and (2) a diazole are novel catalysts in the process of reacting an alkali metal phenate, pyridinate or pyrimidinate with an O,O-dialkyl phosphorochloridothioate or O-alkyl phenylphosphonochloridothioate to produce the corresponding title compounds. The process is conducted under alkaline conditions in a liquid reaction medium. As an example, O,O-diethyl O-(3,5,6-trichloro-2-pyridyl)phosphorothioate is prepared in excellent yields and purity by reacting sodium 3,5,6-trichloro-2-pyridinate with O,O-diethyl phosphorochloridothioate in a stirred methylene chloride-water reaction medium in the presence of a catalytic amount of benzyltriethylammonium chloride and 1-methylimidazole.
    Type: Grant
    Filed: July 31, 1975
    Date of Patent: June 7, 1977
    Assignee: The Dow Chemical Company
    Inventors: Lorraine M. Kroposki, Masao Yoshimine, Harold H. Freedman
  • Process for preparing phosphorothioates and phenylphosphonothioates
    Patent number: 4016225
    Abstract: Mixtures of (1) a quaternary ammonium salt(s) and (2) 1,4-diazabicyclo[2.2.2]octane are novel catalysts in the process of reacting an alkali metal phenate, pyridinate or pyrimidiate with an O,O-dialkyl phosphorochloridothioate or O-alkyl phenylphosphonochloridothioate to produce the corresponding phosphorothioates and phenylphosphonothioates. The process is conducted under alkaline conditions in a liquid reaction medium. As an example, O,O-diethyl 0-(3,5,6-trichloro-2-pyridyl)phosphorothioate is prepared in excellent yields and purity by reacting sodium 3,5,6-trichloropyridinate with O,O-diethyl phosphorochloridothioate in a stirred methylene chloride-water reaction medium in the presence of a catalytic amount of benzyltriethylammonium chloride and 1,4-diazabicyclo[2.2.2]octane.
    Type: Grant
    Filed: July 31, 1975
    Date of Patent: April 5, 1977
    Assignee: The Dow Chemical Company
    Inventors: Lorraine M. Kroposki, Masao Yoshimine
  • Process for preparing phosphorothioates and phenylphosphonothioates
    Patent number: 4007197
    Abstract: Quaternary ammonium salts and sterically unhindered, nucleophilic, tertiary amines are novel cocatalysts which are used in the process of reacting an alkali metal phenate, pyridinate or pyrimidinate with an O,O-dialkylphosphorochloridothioate or O-alkyl phenylphosphonochloridothioate to produce the corresponding phosphorothioates and phenylphosphonothioates. The process is conducted under alkaline conditions in a liquid reaction medium.
    Type: Grant
    Filed: June 10, 1975
    Date of Patent: February 8, 1977
    Assignee: The Dow Chemical Company
    Inventors: Harold H. Freedman, Stanley D. McGregor, Masao Yoshimine, Lorraine M. Kroposki