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1-N-(D-Threo-3-amino-2-hydroxybutanoyl)-2',3'-dideoxykanamycin+ ++ A has been prepared by coupling of 3,6'-bis(N-benzyloxycarbonyl)-2',3'-dideoxy-3"-N-(trifluoroacetyl)kanamy cin A with D-threo-3-azido-2-hydroxybutanoic acid. A diastereomeric mixture of the erythro analog has also been prepared by use of racemic erythro-3-azido-2-hydroxybutanoic acid. Synthesis of the D-threo- and racemic erythro-3-amino-2-hydroxybutanoic acids has been described.

Synthesis of 1-N-(D-threo- and racemic erythro-3-amino-2-hydroxybutanoyl)-2',3'-dideoxykanamycin A.