Sulfur Containing Preservative Or Stabilizer Patents (Class 570/106)
  • Solid-phase preparation of [F]fluorohaloalkanes
    Patent number: 7999139
    Abstract: The invention relates to a process for the production of an [18F]fluorohaloalkane which comprises treatment of a solid support-bound precursor of formula (I): SOLID SUPPORT-LINKER-SO2—O—(CH2)nX??(I) wherein n is an integer of from 1 to 7 and X is chloro, bromo or iodo; with 18F? to produce the [18F]fluorohaloalkane of formula (II) 18F—(CH2)n—X??(II) wherein n and X are as defined for the compound of formula (I), optionally followed by (i) removal of excess 18F?, for example by ion-exchange chromatography; and/or (ii) removal of organic solvent.
    Type: Grant
    Filed: May 1, 2007
    Date of Patent: August 16, 2011
    Assignee: Hammersmith Imanet Limited
    Inventors: Frank Brady, Sajinder Kaur Luthra, Yongjun Zhao
  • Solid-phase preparation of [F] fluorohaloalkanes
    Patent number: 7223891
    Abstract: The invention relates to a process for the production of an [18F]fluorohaloalkane which comprises treatment of a solid support-bound precursor of formula (I): SOLID SUPPORT-LINKER-SO2—O—(CH2)nX (I) wherein n is an integer of from (1) to (7) and X is chloro, bromo or iodo; with 18F? to produce the [18F]fluorohaloalkane of formula (II) 18F—(CH2)n—X (II) wherein n and X are as defined for the compound of formula (I), optionally followed by (i) removal of excess 18F?, for example by ion-exchange chromatography; and/or (ii) removal of organic solvent.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: May 29, 2007
    Assignee: Hammersmith Imanet Ltd.
    Inventors: Frank Brady, Sajinder Kaur Luthra, Yongjun Zhao
  • Trichloroethylene composition stabilized against oxidation
    Patent number: 4404412
    Abstract: Trichloroethylene is stabilized against oxidation by adding a nitrogen-containing compound selected from among .alpha.-(dimethylamino) propionitrile, thiazole, 1-aza-2-alkoxy-1-cycloalkene and 1,5-diazabicyclo[5.4.0]undec-5-ene. These may be used in combination with ethyl acetate, acetonitrile and pyrazine.
    Type: Grant
    Filed: February 4, 1982
    Date of Patent: September 13, 1983
    Assignee: The Dow Chemical Company
    Inventors: Nobuyuki Ishibe, Jimmie K. Harden
  • Stabilization of dibromostyrene
    Patent number: 4375006
    Abstract: Dibromostyrene has a marked tendency to polymerize on storage. The induction period can be lengthened with the use of a stabilizing quantity of n-propylgallate. The induction period can be markedly prolonged when the gallate ester is admixed with phenothiazine, N,N,N',N'-tetramethyl-p-phenylenediamine, or 4-tert-butyl catechol.
    Type: Grant
    Filed: August 14, 1981
    Date of Patent: February 22, 1983
    Assignee: Ethyl Corporation
    Inventor: Philip F. Jackisch
  • Stabilization of dibromostyrene
    Patent number: 4338474
    Abstract: Dibromostyrene is stabilized against unwanted polymerization by incorporating therein a stabilizing amount of phenothiazine or a substituted phenothiazine such as 3,3'-dioctylphenothiazine. The phenolthiazine can be admixed with a dihydroxy aromatic compound such as 4-methyl catechol.
    Type: Grant
    Filed: March 13, 1980
    Date of Patent: July 6, 1982
    Assignee: Ethyl Corporation
    Inventor: Philip F. Jackisch