Substituted ethane diphosphonic acids and salts and esters there

Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal

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210 58, 252 81, 252 86, 252 87, 252 88, 260348R, 260348A, 260429R, 260429J, 2604291, 2604292, 2604297, 260431, 260432, 260435R, 2604385R, 260439R, 2604656, 2605011, 26050112, 26050119, 26050121, 260926, 260932, 260938, C07F 938, C07F 928

Patent

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039404366

ABSTRACT:
New and useful substituted ethane diphosphonic acids and salts thereof as exemplified by the compound having the formula ##EQU1## 2-amino-1-hydroxyethane-1,1-diphosphonic acid and processes for preparing the same which generically comprise the "de-oxiranization" of an epoxy ethane diphosphonate having the formula ##EQU2## wherein R.sub.3 is hydrogen, a metal ion, or an organic radical.

REFERENCES:
patent: 2900408 (1959-08-01), Blaser et al.
patent: 3214454 (1965-10-01), Blaser et al.
patent: 3234124 (1966-02-01), Irani
patent: 3299123 (1967-01-01), Fitch et al.
patent: 3366677 (1968-01-01), Quimby
patent: 3475486 (1969-10-01), Irani et al.
patent: 3670015 (1972-06-01), Prentice

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