Process for the preparation of halogenated 2,2-bis(trifluorometh

Details Process for the preparation of halogenated 2,2-bis(trifluorometh Process for the preparation of halogenated 2,2-bis(trifluorometh

1991-09-06

1993-01-05

Chan, Nicky

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D31716

Patent

active

051772248

ABSTRACT:
A process for the production of a halogenated 2,2-bis(trihaloalkyl)-1,3-dioxolane of the formula ##STR1## wherein R.sub.f is perhaloalkyl comprising a 2,2-bis(trihaloalkyl)-1,3-dioxolane in the presence of at least one of La, Ni, Sn, Zn, Fe, Co or Cu is disclosed.
A process for the production of a halogenated 2,2-bis(trihaloalkyl)-1,3-dioxolane of the formula ##STR2## wherein X is Cl and each Y is independently Cl or F and wherein at least one Y is F, comprising fluorinating a halogenated 2,2-bis(trifluoromethyl)-4,4,5,5-tetrachloro-1,3-dioxolane in the presence of a catalyst which is preferably Cr.sub.2 O.sub.3 is disclosed.
A process for the production of a 2,2-bis(trihaloalkyl)-1,3-dioxole of the formula ##STR3## comprising dehalogenating substantially only a corresponding trans-2,2-bis(perhaloalkyl)-4,5-difluoro-4,5-dichloro-1,3-dioxolane is disclosed.

REFERENCES:
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patent: 4053530 (1977-10-01), Schindel
patent: 4496750 (1985-01-01), Anderson et al.
patent: 4535175 (1985-08-01), Squire
Roberts et al., "Basic Principles of Organic Chemistry", W. A. Benjamin, Inc., New York, 1965, pp. 315-318.
J. Fluorine Chem., vol. 9, No. 9, 1977, R. D. Bagnall et al.: "New Inhalation Anaesthetics:I. Fluorinated 1,3-Dioxolane Derivatives", pp. 359-375, see p. 371.

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