Production of halogen-containing tertiary phosphine oxides

Details Production of halogen-containing tertiary phosphine oxides Production of halogen-containing tertiary phosphine oxides

1975-03-13

1976-12-21

Sneed, Helen M. S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07F 902

Patent

active

039988864

ABSTRACT:
Production of halogen-containing tertiary phosphine oxides of the general formula (I) ##STR1## in which R.sub.1 stands for an alkyl, halogenoalkyl, alkenyl, halogenoalkenyl, alkinyl or halogenoalkinyl radical, each of these radicals containing from 1 to 18 carbon atoms, or stands for a cycloalkyl, a halogenated cycloalkyl, an aryl, a halogenated aryl, an aralkyl or a halogenated aralkyl radical, and X stands for halogen.
The oxides are made by subjecting a compound of the general formula (II) ##STR2## in which R has the same meaning as R.sub.1 and X stands for halogen, to thermal treatment in the presence of hydrogen halide at atmospheric or at elevated pressure so as to split off water and formaldehyde in vapor form therefrom; by continuously freeing the resulting reaction mixture from the said components in vapor form; by terminating the reaction and thereafter stripping off the hydrogen halide from the reaction mixture by introducing an inert gas thereinto; and by purifying the remaining crude product by distillation or recrystallization.

REFERENCES:
patent: 3716580 (1973-02-01), Maier
patent: 3732316 (1973-05-01), Lin
Epstein et al., Tetrahedron Letters, v18, pp. 1231-1242, pp. 1211-1219 (1962).
Buckler, J.A.C.S., v82, pp. 4215-4220 (1960).
Buckler et al., J.A.C.S., v82, pp. 2076-2077 (1960).
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Hellmann et al., Ann., v659, pp. 49-63 (1962).
Petrov et al., Russ. Chem. Rev., v37, pp. 437-439 (1968).
Kosolapoff et al., Organic Phosphorus Compounds, Wiley-Interscience, N.Y. vol. 1, pp. 99, 100 (1972).
Cotton Progress in Inorganic Chemistry, Interscience Publ., N.Y., vol. 5, pp. 47-49 (1963).

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