Process for the preparation of 1-aminoalkane-1,1-diphosphonic ac

Details Process for the preparation of 1-aminoalkane-1,1-diphosphonic ac Process for the preparation of 1-aminoalkane-1,1-diphosphonic ac

1972-03-16

1977-02-01

Evans, Joseph E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

252 88, 252180, 260290R, 26050112, C07F 938

Patent

active

040061825

ABSTRACT:
Process for the preparation of 1-aminoalkane-1,1-diphosphonic acids of the formula ##STR1## in which R.sub.1 represents a member selected from the group consisting of alkyl with 1 to 20 carbon atoms, phenyl, phenylalkyl with 7 to 12 carbon atoms, alkylphenyl with 7 to 12 carbon atoms, and in which R.sub.2 represents a member selected from the group consisting of hydrogen and alkyl with 1 to 4 carbon atoms, consisting essentially of reacting adducts of a hydrogen halide selected from the group consisting of HCl and HBr to a corresponding carboxylic acid amide of the formula

REFERENCES:
patent: 3549728 (1970-12-01), Balde et al.
patent: 3565949 (1971-02-01), Cummins
patent: 3668138 (1972-06-01), Hoover et al.
Wagner et al., "Synthetic Organic Chemistry", (1953), pp. 565,566,567,570.

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