Acetic Acid → Ethyl 2-cyanoethyl(diethoxymethyl)phosphinate

Beteiligte Stoffe

Reaktionsschritte

The starting material can be prepared as follows: A solution of 20 g of ethyl(diethoxymethyl)phosphonite (Aust. J. Chem. 33, 292 (1980)) and 5 g of acrylonitrile in 25 ml of ethanol is added to a stirred mixture of 1 g of sodium hydride (50% dispersion in oil) in 25 ml of ethanol at 0° C. under an atmosphere of nitrogen. The reaction mixture is allowed to warm to room temperature and stirred for 4 hours. 1 ml of glacial acetic acid is added and the mixture is concentrated under reduced pressure. The resulting crude product is dissolved in 50 ml of ethyl acetate, washed twice with 26 ml of water, and the organic extract is dried over magnesium sulphate, and then concentrated under reduced pressure. The crude product is distilled under reduced pressure to give ethyl 2-cyanoethyl(diethoxymethyl)phosphinate, b.p. 114° C./0.01 mbar, 31P=+40.8 ppm (CDCl3).

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