Process for the production of...

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C - Chemistry, Metallurgy

07

F

C07F 9/38 (2006.01)

Patent

CA 2197267

A process is provided for the preparation of 4-amino-1-hydroxybutylidene- 1,1-bisphosphonic acid or salts thereof which comprises of: a) reacting 4-aminobutyric acid with phosphorous acid and phosphorus trichloride in the presence of a polyalkylene(glycol); and b) recovering said 4-amino-1-hydroxybutylidene-1,1-bisphosphonic acid or salts thereof.

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