METHOD OF OBTAINING BENZO[b][1,4]DIAZEPINE-2,4-DIONE DERIVATIVE Russian patent published in 2015 - IPC C07D243/12 

FIELD: medicine, pharmaceutics.

SUBSTANCE: invention relates to field of organic chemistry, namely to method of obtaining compounds of formula , where each of R¹, R², R³ and R⁴, which can be similar or different, represents hydrogen atom or lower alkyl group, including removal of protective group (R⁵) from formula compound, where R⁵ represents benzyl group, which can be substituted by reduction in presence of reducing agent of catalytic hydrogenation. Invention also relates to intermediate compound of formula (2) or , as well as to method of its obtaining.

EFFECT: industrially efficient, simple and effective method of obtaining basic intermediate product for production of therapeutic anti-arrhythmia means is developed.

6 cl, 44 ex