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- W2068467925 abstract "The synthesis of Etidronate (as the disodium salt) by the reaction of acetic acid with phosphorus trichloride/ phosphorus acid in methanesulfonic acid was studied and optimized. We showed that it is enough to use 3.2 equivalents of the phosphorus trichloride and there is no need to apply phosphorus acid. In the two-step variation of the synthesis, the acetyl chloride was formed by the reaction of acetic acid with phosphorus trichloride, thionyl chloride or triphosgene, then the intermediate was converted to etidronate by reaction with 2.2 equivalents of phosphorus trichloride. The work-up included in all cases hydrolysis and pH adjustment. Keywords: Hydroxy-methylenebisphosphonic acid, Etidronate, Optimization, Intermediate." @default.
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- W2068467925 date "2013-08-01" @default.
- W2068467925 modified "2023-10-18" @default.
- W2068467925 title "Optimized Synthesis of Etidronate" @default.
- W2068467925 doi "https://doi.org/10.2174/15701808113109990026" @default.
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