Аннотация:3,7-Diaminobicyclo[3.3.1]nonanes were synthesized starting from adamantane-2-on. endo,endo-3,7-Diaminobicyclo[3.3.1]nonane was obtained through Schmidt rearrangement of 3,7-bicyclo[3.3.1]nonane dicarboxylic acid. The endo,exo-isomer was synthesized by Schmidt rearrangement of 3-oximinobicyclo[3.3.1]nonane-7-carboxylic acid in acidic media following reduction of oximino group which was unprecedentedly stable in the Schmidt reaction conditions.