Chlorination process

Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing

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568316, C07C 4563

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active

046754482

ABSTRACT:
1-[2,5-Bis(2,2,2-trifluoroethoxy)phenyl]ethanone is chlorinated to 1-[2,5-bis(2,2,2-trifluoroethoxy)phenyl]-2,2-dichloroethanone and, if desired, to 1-[2,5-bis(2,2,2-trifluoroethoxy)phenyl]-2,2,2-trichloroethanone in a solvent mixture of about 0.5-35 parts by volume of 1,2-dichloroethane and one part by volume of acetic acid. The products can then be converted to flecainide. In a preferred embodiment of the invention, the starting material is a crude, wet material that is prepared with a minimum of solids handling.

REFERENCES:
patent: 3367857 (1968-02-01), Falbe et al.
patent: 3390187 (1968-06-01), Falbe et al.
patent: 3850989 (1974-11-01), Havinga et al.
patent: 4001335 (1977-01-01), Schaffner et al.
patent: 4289909 (1981-09-01), Freenor et al.
Minakov et al., Chemical Abstracts, vol. 87, 6756z (1977).

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