Processes for the preparation of octafluoro-[2,2]paracyclophane

Details Processes for the preparation of octafluoro-[2,2]paracyclophane Processes for the preparation of octafluoro-[2,2]paracyclophane

1991-12-20

1993-05-11

Cintins, Marianne M.

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

Organic compounds

Halogen containing

570129, C07C 2200

Patent

active

052103412

ABSTRACT:
Processes are disclosed for the preparation of octafluoro-[2,2]paracyclophane which utilize a low temperature, e.g., less than about 200.degree. C., and a reducing agent comprising titanium to promote the dimerization of dihalo-tetrafluoro-p-xylenes. One suitable reducing agent is prepared by combining TiCl.sub.4 with LiAlH.sub.4 in an organic solvent.

REFERENCES:
patent: 3268599 (1966-08-01), Chow
patent: 3274267 (1966-09-01), Chow
patent: 3297591 (1967-01-01), Chow
patent: 4849559 (1989-07-01), Lee et al.
patent: 5110903 (1992-05-01), Lee et al.
Chow, Pilato and Wheelwright, The Synthesis of 1,1,2,2,9,9,10,10,Octafluoro-[2,2]paracyclophane, The Journal of Organic Chemistry, vol. 35, No. 1, 20-22, Jan. 1970.
Cooper, Reductive Coupling of Arkyl Halides by Vanadium (II), Journal of the American Chemical Society, 4158-4162, Jun. 27, 1973.
Olah and Prakash, Synthetic Methods and Reactions; XVIII, Preparation of Alkenes via Dehalogenation of vic-Dihaloalkanes, Coupling of Allyl and Benzyl Halides, . . . Communications, 607-609, Sep., 1976.
Ho and Olah, Synthetic Methods and Reactions; 34. Coupling of Benzylic and Allylic Halides and Debromination of vic-Dibromides with Vanadium (III) Chloride/Lithium Tetrahydroaluminate, . . . Communications, 170-171, Mar. 1977.
Eisch and Piotrowski, The Titanocene Methylene-Zinc Halide Complex: A Convenient Synthesis and its Methylenating Action on Unsaturated Carbon Centers, Tetrahydron Letters, vol. 24, No. 20, 2043-2046, 1983.
Pons and Santelli, Tetrahedron Report No. 237, Tetrahedron, vol. 44, No. 14; 4295-4312, 1988.

Affiliated with

Also associated with

Rating

Processes for the preparation of octafluoro-[2,2]paracyclophane does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Processes for the preparation of octafluoro-[2,2]paracyclophane, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Processes for the preparation of octafluoro-[2,2]paracyclophane will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1352314