Lithium hydroxide, monohydrate → HCID 19748746, compound

Participants

Reaction Steps

0.43 g of lithium hydroxide monohydrate in 6 ml of water is added to a solution of 2.0 g of 3-[N-(p-chlorobenzyl)-N-methylamino]propyl(diethoxymethyl)phosphinic acid ethyl ester in 5.5 ml of ethanol, and the mixture is heated at 60° for 25 hours. The reaction mixture is cooled to room temperature, the solvent is removed under reduced pressure, and the evaporation residue is taken up in water and neutralised with phosphoric acid. The suspension formed is concentrated to dryness by evaporation, and the residue is taken up in hot methanol, filtered and concentrated by evaporation again. Crystallisation of the residue from propanol yields 3-[N-(p-chlorobenzyl)-N-methylamino]propyl(diethoxymethyl)phosphinic acid having a melting point of 170°-171.5°.

Provenance & Evidence