2-iodo-perfluoro-2-methylalkanes, processes for their preparatio

Details 2-iodo-perfluoro-2-methylalkanes, processes for their preparatio 2-iodo-perfluoro-2-methylalkanes, processes for their preparatio

1986-12-31

1988-07-26

Evans, J. E.

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

Organic compounds

Halogen containing

570161, 570174, C07C 1907, C07C 1704

Patent

active

047602058

ABSTRACT:
New processes for the preparation of 2-iodo-perfluoro-2-methyl-butane and the corresponding -pentane are described. In one process, perfluoro-2-methyl-2-butene or the corresponding -pentene is reacted in an amount of at least 5 mol with a mixture of 2 mol of iodine and 1 mol of iodine pentafluoride in the presence of more than 1 mol of at least one fluoride of a metal of group I of the periodic table of the elements under the autogenous pressure of the reaction mixture at 170.degree. to 220.degree. C. for 2 to 30 hours. In another process, the same perfluoroolefins are reacted, as the starting substances, with iodine and an alkali metal fluoride in the presence of at least 1 mol of a soluble silver salt per mole of the perfluorinated olefin at 20.degree. to 100.degree. C. for 0.5 to 10 hours. After working up by distillation, the pure iodoperfluoroalkanes are obtained. They are suitable for numerous reactions, but in particular as a packing for lasers.

REFERENCES:
patent: 3008966 (1961-11-01), Hauptschein et al.
patent: 3377390 (1968-04-01), Rondestredt
Seel, F. et al., Chem. Abs., 60:15407a, abstracting Z. Anorg. Allgem. Chem. 327, 28-31, (1964).
Mochalina, E. P. et al., Chem. Abs. 66:45901y, (1967), abstracting Dokl. Akad. Nauk SSSR 169, 1346-9, (1966).
Hauptschein, M. et al., J. Amer. Chem. Soc. 80, 842-845, (1958).
Kolta, G. et al., J. Fluorine Chem., 14, 331-337, (1979).
Ishikawa, M. et al., Chem. Lett., 1980, 1089-1090.

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