| 摘要 |
3-Alkyl-3-oxo-1-aminopropane-1,1-diphosphonic acids and water-soluble salts thereof corresponding to the formula <IMAGE> (III) in which R1 represents an unbranched or branched C1-C8 alkyl group, R2 and R3 independently of one another represent methyl or ethyl, and each M represents H or a cation of a water-soluble base, to a process for producing these compounds wherein oxonitriles corresponding to the formula: <IMAGE> (IV) in which R1, R2 and R3 are as defined above, are reacted with mixtures of a phosphorus trihalide PX3, where X represents fluorine, chlorine or bromine, with phosphorous acid, the reaction mixture is hydrolyzed, and the reaction products are optionally converted into water-soluble salts; and to the use of the resulting compounds corresponding to general formula (III).
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