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A series of 1-alkyl-or 1-aryl-1-hydroxy-2-N-hydroxylaminoethylphosphonic acids was prepared by controlled reduction of dialkyl 1-alkyl-or 1-aryl-1-hydroxy-2-nitroethyl phosphonates with aluminum amalgam or stannous chloride followed by subsequent acid hydrolysis or dealkylation via the corresponding trimethylsilyl ester.
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Yuan et al. (1993) studied this question.
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