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

1992-10-16

1994-02-15

Lipman, Bernard

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C08F 1624

Patent

active

052868249

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:
patent: 3749791 (1973-07-01), Terreli et al.
patent: 4535175 (1985-08-01), Squire
R. D. Bagnall et al., J. Fluorine Chem., vol. 9, No. 9, pp. 359-375 (1977).
Sokolov, Nucleic Acids Research, vol. 18, No. 12, 1990, p. 3671.
Prober et al., Science, vol. 238, Oct. 16, 1987, pp. 336-341.
Wu et al., Proceedings of the National Academy of Sciences of USA, vol. 86, Apr. 1989.

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