Preparation of N-acylaminomethylphosphonic acids and aminomethyl

Details Preparation of N-acylaminomethylphosphonic acids and aminomethyl Preparation of N-acylaminomethylphosphonic acids and aminomethyl

1992-09-25

1993-08-03

Dees, Jose G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus acids or salts thereof

C07F 930

Patent

active

052330800

ABSTRACT:
N-acylaminomethylphosphonic acids having the formula RCO--NH--CH.sub.2 --P(.dbd.O)(OH).sub.2, where R is a non-interfering organic radical, are prepared by (A) combining a solution of a carboxamide, RCO--NH.sub.2, paraformaldehyde and phosphorous acid in an anhydrous solvent with a carboxylic acid anhydride, e.g., acetic anhydride, or (B) combining a solution of the carboxamide and paraformaldehyde in an anhydrous solvent with a solution of the carboxylic acid anhydrid and phosphorous acid in an anhydrous solvent, followed by heating the resulting solution to complete the reaction. The N-acylaminomethylphosphonic acids can be hydrolyzed to aminomethylphosphonic acid.

REFERENCES:
patent: 4470191 (1984-09-01), Cottrell et al.
patent: 4657705 (1987-04-01), Miller et al.
patent: 4851159 (1989-07-01), Fields et al.
patent: 5041627 (1991-08-01), Baysdon et al.

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