Ammonia → Cgp-36216

Participants

Reaction Steps

In a glass autoclave, 240 g of ethanol, 68 g of ammonia, 52 g of water, 6.4 g of Raney® nickel (doped with 1.5% by weight of chromium), 54.4 g (0.37 mol) of ethyl-(2-cyanoethyl)phosphinic acid (produced as in Example 5) are reacted at 70° C. with hydrogen at 25 bar. Following a reaction time of 8 hours, the autoclave was let down, the reaction solution was filtered and the filtrate was concentrated in vacuo. The residue obtained is taken up in 150 g of water admixed with about 30 g (0.37 mol) of 50% sodium hydroxide solution and neutralized by addition of about 18.1 g (0.19 mol) of concentrated sulfuric acid, and thereafter the water is distilled off in vacuo. The residue is taken up in ethanol and filtered. The solvent of the filtrate is removed. The product is purified by chromatography to obtain 37.4 g (67% of theory) of ethyl(3-aminopropyl)phosphinic acid as colorless oil.

Provenance & Evidence