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ChemicalBook CAS DataBase List AMifaMpridine Phosphate
446254-47-3

AMifaMpridine Phosphate synthesis

3synthesis methods
-

Yield:446254-47-3 16.6 g

Reaction Conditions:

with phosphoric acid in dimethyl sulfoxide at 15 - 20;

Steps:

4; 5 Preparation of Amifampridine Phosphate (I)

Amifampridine (10 gm) was charged in to reaction flask containing DMSO (40.0 ml). cool the reaction mass to 15-20° C. ortho Phosphoric acid (17 ml) was added under stirring at 15-20° C. Charge acetone (167.0 ml) into the reaction mass at 20-25° C. and continue stirring for 10-15 minutes. Cooled the reaction mass to 0-5° C. and continue stirring for 3 to 4 hours at 0-5° C. Filtered the material and washed with Acetone (100.0 ml). Dried the material under vacuum at 40-45° C. for 6 hours to 10 hours to yield highly pure Amifampridine phosphate. Yield: 16.6 gm Chromatographic Purity (By HPLC): 99.90%

References:

US2022/127231,2022,A1 Location in patent:Paragraph 0077-0087