1,2,2,2-Tetrafluoroethyl chlorofluoromethyl ether - prepd by photochlorination and fluorination of des-halo derivs

    公开(公告)号:DE2361058A1

    公开(公告)日:1975-06-19

    申请号:DE2361058

    申请日:1973-12-07

    Applicant: HOECHST AG

    Abstract: chlorofluoromethyl ether (I) of the formula: CF3-CHF-3-CHF-Cl is a new cpd. which may be prepd. by (a) subjecting an ether of the formula: CF3-nClnCHF1-mClm-O-CH3 (II) (where n is 0, 1, 2 or 3 and m is 0 or 1) to partial photochlorination to give an ether of the formula: CF3-nCln-CHF1-mClm-O-CH2Cl (III), fluorinating (III) to give the other of the formula: CH3-CHF-O-CH2F (IV), again chlorinating (IV), and isolating (I) from the chlorination mixt. by conventional procedures, or (b) converting (II; n = m = 0) by partial photochlorination into the ether of the formula: CF3-CHF-O-CHCl2 (VI), partially fluorinating (VI), and isolating (I) from the fluorination mixt. in a conventional manner. (I) is of use as an inhalation anaesthetic. Due to its relatively low b. pt. (51.5 degrees C/-760 mm.) it can be readily and controllably admixed with respiration mixts. contg. sufficient oxygen to maintain life.

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