CARBAMIC ACID DERIVATIVES AND THEIR PHARMACEUTICALLY ACCEPTABLE ACID-ADDITIVE SALTS, METHOD OF THEIR SYNTHESIS (VARIANTS) AND PHARMACEUTICAL COMPOSITION Russian patent published in 1998 - IPC

FIELD: organic chemistry. SUBSTANCE: invention proposes derivatives of carbamic acid of the general formula (I): where R¹ means group of the general formula (II) or (III) where R⁴ - phenyl(lower)alkyl; R⁵ - phenyl(lower)alkyl or hydrogen atom; R⁶ - hydrogen atom; R² means group of the general formula (IV) or (V) where X - hydrogen atom and R⁷,R⁸,R⁹,R¹⁰ and R¹¹ means lower alkyl, and pharmaceutically acceptable acid-additive salts, and a method of their synthesis. The synthesized compounds can be used in medicine, in part, in neurology (for Alzheimer disease treatment). EFFECT: improved method of synthesis. 10 cl, 1 tbl