FIELD: organic chemistry. SUBSTANCE: tricyclic nitrogen-containing compounds of the formula (I) given in description where R1-R3-H, C1-C6-alkyl, C3-C5-alkenyl, C3-C5-alkinyl, C3-C7-cycloalkyl, C4-C10-cycloalkyl or phenyl-substituted C1-C6-alkyl-group; 
- a residue of C3-C7-cyclic amine; X - H, C1-C6-alkyl, halogen, OH, C1-C6-alkoxy-, CN, carboxyamide, carboxyl, C1-C6-alkoxycarbonyl; A - CH, CH2, CH=halogen, CHCH3, C=O, C=S, C-SCH3, C= NH, C-NH2, C-NHCH3, C-NHCOOCH3, C-NHCN, SO2, N; B-CH2, CH, CH=halogen, C=O, N, NH or N-CH3, O; n = 0-1; D - CH, CH2-halogen, C=O; O, N, NH, N-CH3. Synthesized compounds are used in pharmacology. EFFECT: improved method of synthesis. 16 cl, 2 tbl
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