FIELD: medicine, pharmaceutics.
SUBSTANCE: in the given invention, there is offered a method for preparing a compound of formula 
, where Y is specified of CH3, CH2OH, CH2CH2OH, CH2Br and Br; involving the stages: (1) reaction of the compound of formula 
where OX represents hydroxy or O-M+ where M+ represents cation chosen of Li+, Na+ and K+ and Y is such as specified above; with trans-cynnamaldehyde 
, with a secondary amine compound added; then (2) acid treatment of a product from the previous stage to prepare a compound of formula (I). The aforesaid method can be used for preparing tolterodine and fezoterodine which are effective in treating the hyperactive urinary bladder. There are also declared compounds of formulae V, VI and VII.
EFFECT: development of the effective method for preparing the compound.
25 cl, 19 ex
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