Process for the preparation of alkali metal salts of 2-phosphono

Details Process for the preparation of alkali metal salts of 2-phosphono Process for the preparation of alkali metal salts of 2-phosphono

1991-08-19

1993-08-03

Dees, Jose G.

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

Organic compounds

Carboxylic acids and salts thereof

C07C 5522

Patent

active

052330885

ABSTRACT:
The present invention relates to a process for the preparation of alkali metal salts of 2-phosphonobutane-1,2,4-tricarboxylic acid, characterized in that 2-phosphonobutane-1,2,4-tricarboxylic acid penta-alkyl esters or partial esters are reacted with an aqueous alkali metal hydroxide solution in a ratio of from 0.5 to 0.76 mol, preferably from 0.6 to 0.7 mol of alkali metal hydroxide per mol of ester function at temperatures from 20.degree. to 200.degree. C. in a one-shot process.

REFERENCES:
Cram et al., Organic Chemistry, 2nd Ed., McGraw-Hill Book Co., New York, p. 355 (1964).

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