3.1] NONANE DERIVATIVES. FIELD: chemical industry. SUBSTANCE: described is new method of preparing 3-azabicyclo [3.3.1]nonane derivatives of formula I: 
wherein R is CH3 (a); C2H5 (b); C4H9 (C); CH2C6H5 (d); (CH2)2Br (e); ((CH2)2OH) (f); CH2COOH (g); (CH2)2COOH (h) using Mannich reaction. Original 2,4-dinitrophenol is reacted with sodium ethoxide in the presence of acetone to form 6- acetonyl-1,5-bis(acinitro)cyclohexen-3-one-2 disodium salt of formula: 
which is reacted with mixture of formaldehyde and primary amine and reaction solution is then acidified with acetic acid to prepare compounds of formula I. Said method makes it possible to prepare polyfunctional compounds which open up possibility of wide modification of substituents and functional groups therein. EFFECT: improved properties of the title compounds. 2 ex
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