Process for the preparation of aminomethanephosphonic acid and a

Details Process for the preparation of aminomethanephosphonic acid and a Process for the preparation of aminomethanephosphonic acid and a

1994-11-23

1997-10-21

Conrad, Joseph

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

Organic compounds

Phosphorus acids or salts thereof

C07F 902, C07F 928

Patent

active

056798423

ABSTRACT:
Aminomethanephosphonic acid and aminomethylphosphinic acids are interesting as biologically active compounds or as intermediates for the preparation of biologically active compounds. According to the invention, such compounds of the formula I ##STR1## in which R.sup.1 is OH, C.sub.1 -C.sub.4 -alkyl or phenyl, can be prepared in a technically simple manner by reacting compounds of the formula II ##STR2## in which R.sup.2 is H, C.sub.1 -C.sub.6 -alkyl, benzyl, phenyl, optionally substituted by C.sub.1 -C.sub.4 -alkyl, -alkoxy and/or halogen, and R.sup.1 is as defined above, with water, at 80.degree. to 300.degree. C.

REFERENCES:
patent: 2328358 (1943-08-01), Pitman
patent: 4368162 (1983-01-01), Maier
Chemical Abstracts, vol. 107, p. 714, 39933j: "A convenient synthesis of aminomethylphosphonic acid", 1987.
Soroka, Synthesis 1989, pp. 547-548.
March Adv. Org. Chem. 3rd Ed (1985) pp. 338-339.

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