Patents Assigned to Cr1stalia Productos Quimicos Farmaceuticos LTDA
  • Publication number: 20100004490
    Abstract: The present invention refers to a process for the preparation of chloromethyl 2,2,2-trifluoro-1-(trifluoromethyl) ethyl ether (sevochlorane), which consists of reacting hexafluoroisopropanol with: a formaldehyde equivalent selected between paraformaldehyde or 1,3,5-trioxane, a chlorinating agent selected from the group consisting of oxalyl chloride, phosphorus trichloride, phosphorus pentachloride, phosphorus oxychloride, sulfuryl chloride and thionyl chloride, and a strong acid selected from the group consisting of concentrated or fuming sulfuric acid. Said process provides sevochlorane in high purity and yield, which can be converted to sevoflurane by known means.
    Type: Application
    Filed: September 29, 2006
    Publication date: January 7, 2010
    Applicant: Cr1stalia Productos Quimicos Farmaceuticos LTDA
    Inventors: Ogari Pacheco, Antonio Carlos Teixeira, Edson Luiz Lima, Maria Alice Böckelmann