Monomer precursor isomerization

Details Monomer precursor isomerization Monomer precursor isomerization

1994-10-14

1996-06-04

Ivy, C. Warren

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D31716

Patent

active

055234224

ABSTRACT:
A process is disclosed for producing a 2,2-bis-substituted-trans-4,5-dichloro-4,5-difluorodioxolane of the formula ##STR1## wherein R.sub.f is selected from the group consisting of --R.sup.2.sub.f, --F, --C(O)F, --C(O)OR and R.sup.3.sub.f Q, and wherein R.sup.1.sub.f is selected from the group consisting of --F and --R.sup.2.sub.f ; wherein R.sup.2.sub.f is a perfluorinated linear or branched alkyl group having 1 to 14 carbon atoms, optionally containing ether oxygen, which is terminally substituted with --F, --Cl, --Br, --OR, --OC.sub.6 F.sub.5, --SO.sub.2 F, --N.sub.3, --CN, --COOCH.sub.3, --COOC.sub.2 H.sub.5, --SO.sub.2 Cl, --C(O)Cl or --C(O)F, wherein R is selected from the group consisting of --CH.sub.3, --C.sub.2 H.sub.5 and --CH.sub.2 CF.sub.3, wherein R.sup.3.sub.f is a single bond or a perfluoroalkylene group having from 1 to 4 carbon atoms optionally containing ether oxygen, and wherein Q is ##STR2## by isomerizing a 2,2-bis-substituted-cis-4,5-dichloro-4,5-difluorodioxolane of the same formula in the presence of a catalyst of the formula AlZ.sub.3, where Z is F, Cl, and/or Br, provided that AlZ.sub.3 is not entirely AlF.sub.3. Also disclosed is a process for producing an olefinic monomer by dechlorinating the trans-isomer products produced by said isomerization.

REFERENCES:
patent: 2925424 (1960-02-01), Simmons, Jr.
patent: 3865845 (1975-02-01), Resnick
patent: 3978030 (1976-08-01), Resnick
patent: 4393227 (1983-07-01), Squire
patent: 4399264 (1983-08-01), Squire
patent: 4535175 (1985-08-01), Squire
patent: 4748284 (1988-05-01), Gozzo et al.
patent: 5017732 (1991-05-01), Zawalski
patent: 5026801 (1991-06-01), Krespan et al.
patent: 5162594 (1992-11-01), Krespan
patent: 5177224 (1993-01-01), Manzer et al.
patent: 5227500 (1993-07-01), Krespan
patent: 5416246 (1995-05-01), Krespan et al.

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