Ammonia → Ethyl 3-amino-l-(4-chlorophenyl)propyl(diethoxymethyl)phosphinate

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Reaction Steps

A solution of 20 g of ethyl 1-(4-chlorophenyl)-2-cyanoethyl(diethoxymethyl)phosphinate in 85 ml of ethanol is added to 131 g of an 8% solution of ammonia in ethanol. To this are added 8.5 ml of Raney Nickel and the resulting mixture is hydrogenated at 1 bar until the theoretical amount of hydrogen has been taken up. The mixture is then filtered, the filtrate is concentrated under reduced pressure and the crude product is distilled under reduced pressure to give ethyl 3-amino-1-(4-chlorophenyl)propyl(diethoxymethyl)phosphinate, b.p. 190° C./0.02 mbar, 31P=+41.5 and +41.3 ppm (CDCl3).

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