Method for producing trialkylphosphine oxides

Details Method for producing trialkylphosphine oxides Method for producing trialkylphosphine oxides

1976-05-26

1978-02-14

Sneed, Helen M. S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07F 953

Patent

active

040738094

ABSTRACT:
The method for producing trialkylphosphine oxides having the general formula R.sub.3 PO, where R is an alkyl having from 1 to 16 carbon atoms, consists in that red phosphorus reacts with an alkyl iodide in the presence of a catalyst -- iodine or hexaalkyliodophosphoranephosphonium pentaiodide -- while gradually adding alkyl iodide to the reaction mixture, and maintaining the reaction temperature at 180.degree. - 230.degree. C., with subsequent isolation of the end product.
The proposed method simplifies the process for preparing trialkylphosphine oxides, increases the yield of the end product to 80- 90 per cent by weight, rules out side reactions of dehydrohalogenation of alkyl iodides, and also shortens the process to 8- 10 hours.

REFERENCES:
chemical Abstracts, V71, 124582b (1969).
Chemical Abstracts, V55, 6418i (1961).
Kasolapoff, Organic Phosphorus Compounds, Wiley-Interscience, N.Y., pp. 374 to 379 (1972).

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