Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1981-11-02
1983-01-11
Evans, Joseph E.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
260938, 260944, 260970, 2605025D, C07C 938
Patent
active
043681620
ABSTRACT:
Aminomethylphosphonic acid is produced by reaction of a hexahydro-1,3,5-triazine-N,N',N"-tris-carboxylic acid ester of the formula ##STR1## wherein R is an alkyl group having 1 to 4 carbon atoms or a phenyl group, in the presence of a Lewis acid as catalyst, with an ester of the phosphorous acid of the formula ##STR2## wherein R.sub.1 is an alkyl group having 1 to 5 carbon atoms, a phenyl group, a benzyl group, the 2-cyanoethyl group or the 2,2,2-trichloroethyl group, to give an N-carboxyaminomethylphosphonic acid derivative of the formula ##STR3## and subsequent hydrolysis thereof in an aqueous medium and in the presence of a strong acid.
Aminomethylphosphonic acid can be used as active substance for influencing plant growth, and as intermediate for producing herbicidal active substances.
REFERENCES:
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patent: 4235809 (1980-11-01), Redmore
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CA 48, (1954).
J. Org. Chem. 29, 832, (1964).
Synth. Inorg. Metal Org. Chem. 2, 317.
Synthesis 1980, 906.
Ciba-Geigy Corporation
Evans Joseph E.
Jorda Karl F.
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