Sodium Hydroxide → HCID 131720379, compound

Participants

Reaction Conditions

Reaction Steps

973 g (6.4 mol) of propanephosphonic acid dimethyl ester are heated to 90° C. and 1280 g (6.4 mol) of 20% strength sodium hydroxide solution are added dropwise, while stirring vigorously. During this procedure, the temperature is increased slowly to 110° C., and at the same time 238 g of a methanol/water mixture distill off over a Vigreux column. The resulting solution is evaporated in vacuo and the residue which remains is dried in a vacuum drying cabinet. 1020 g of propanephosphonic acid monomethyl ester sodium salt are obtained with a purity of 92%, according to 31-P-NMR. This corresponds to a yield of about 100%.

Provenance & Evidence