The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 16, 1995
Filed:
Sep. 30, 1991
Applicant:
Inventors:
Leonid A Rozov, Fair Lawn, NJ (US);
Fernando Quiroz, Elizabeth, NJ (US);
Gerald G Vernice, Nutley, NJ (US);
Assignee:
Ohmeda Pharmaceutical Products Division Inc., Liberty Corner, NJ (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568684 ; 20415792 ;
Abstract
An improved process for the production of isoflurane is disclosed. Isoflurane is formed by the exhaustive chlorination of 2,2,2-trifluoroethyl difluoromethyl ether with chlorine gas. The reaction mixture, preferably without purification or refining, is treated with UV light in the presence of isopropanol to reduce 1,1-dichloro-2,2,2-trifluoroethyl difluoromethyl ether, the other major component thereof, to isoflurane. Isoflurane is thereby obtained in yields of at least 80%.