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(11)    Patent No :    AP 2277   
(21)    Application No :    AP/P/2007/003996   
(22)    Filing Date :    17.11.2005   
(24)    Date of Grant &    01.09.2011   
           
(45)    Publication :

(30)  Priority Data       
(33) Country    (31) Number    (32) Date
US    60/628,708    17.11.2004


(84)    Designated State

BW    GM    GH    KE    LS    MW  MZ   NA   SL
SD    SZ    T Z    UG    ZM    ZW
 
(73) Applicant(s)

PIRAMAL CRITICAL CARE, INC., 50 Cobham Drive, Orchard Park, New York 14127,
United States of America

(72) Inventors

TERRELL Ross C., United States of America

LEVINSON Joshua A., United States of America

et al

(74) Representative

GILL, GODLONTON & GERRANS

ZIMBABWE
 
(51)  International  Classification   C07C41/22 (2006.01)    C07C 41/00 (2006.01)

(54)    Title

Process for production of 1,2,2,2 -tetrafluoro ethyl difluoro methyl ether

(57)    Abstract

A method for the preparation of 1,2,2,2-tetrafluoroethyl difluoromethyl ether (CF3CHFOCHF2), Deflurane is provided, which comprises reacting CF3CHCIOCHF2 (isoflurane) and hydrogen fluoride in the presence of antimony pentafluoride such that deflurane is formed.

(56)    Documents Cited :    GB 2219292 A    US 5 026 924 A    US 6 800 786 A

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