INDOLE DERIVATIVES, THEIR OPTICAL ISOMERS AND PHARMACEUTICALLY ACCEPTABLE SALTS Russian patent published in 1997 - IPC

FIELD: organic chemistry. SUBSTANCE: invention proposes derivatives of indole of the formula (I) where n = 0, 1 or 2; R¹- - H; R²- - H, halogen, cyano-group, ; R³ - H, C_1-6-alkyl at condition that when R² means hydrogen then n = 0 or 1, and also optical isomers and pharmaceutically acceptable salts. The proposed compounds can be used for treatment of migraine and other disorders. EFFECT: improved method of synthesis. 9 cl, 6 tbl