Phosphonic acid → N-methylpyrrolidone-5,5-diphosphonic acid

Beteiligte Stoffe

Reaktionsschritte

28.5 gm of succinic acid monomethylamide (0.216 mol) were melted with 35.4 gm of H3PO3 (0.432 mol) at 70°C and then slowly mixed with 37.8 ml of PCl3 (0.432 mol). After an additional 5 hours at 70°C, the product was hydrolyzed with 300 ml of H2O. Filtration with activated carbon at the boiling point yielded a clear solution from which the N-methylpyrrolidone-5,5-diphosphonic acid was precipitated with ethanol and acetone. Crude yield 4.2 gm (7% of the theory).

Herkunft & Nachweise