摘要 |
FIELD: organic chemistry and technology. SUBSTANCE: invention relates to method of synthesis of pharmaceutically active compounds of the formula (V): <EMI ID=0.371 HE=45 WI=42 TI=CHI> where R<SB>1</SB> and R<SB>2</SB> mean independently hydrogen or lower alkyl at condition that in position 2 of central bicycle none or at least one of both radicals R<SB>1</SB> and R<SB>2</SB> means a substituent distinct from hydrogen and taken from methyl and ethyl; A means -(CH<SB>2</SB>)<SB>n</SB> where n = 1, 2, 3 or 4; R<SB>3</SB>,R<SB>4</SB>,R<SB>5</SB>,R<SB>6</SB> mean independently each of other hydrogen or lower alkyl, or their tautomers, or their salts as indicated in description for the formula (I): <EMI ID=0.372 HE=54 WI=27 TI=CHI> where R<SB>1</SB>,R<SB>2</SB> and A have values indicated above, or their salts. Invention relates to using compounds (I) as intermediate compounds also. EFFECT: improved methods of synthesis. 3 cl
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