NITROGEN-CONTAINING HETEROCYCLIC COMPOUND AND METHOD OF OBTAINING THEREOF Russian patent published in 2014 - IPC C07D213/75 C07D213/89 

FIELD: chemistry.

SUBSTANCE: invention relates to substituted aminopyridine-N-oxide of formula (1) , where R⁴ represents a C_1-6alkoxycarbonylic group. The invention also relates to a method of obtaining aminopyridine-N-oxide of formula (1), including oxidation of an amino-6-methylpyridine derivative of formula (2) with peroxide in the presence of a salt of tungstophosphoric acid of formula Q₃[PW₄O₂₄], where Q represents quaternary ammonium, and to a method of obtaining the formula (8) compound (where R⁶ represents an C_1-6alkoxycarboxylic group and X represents a halogen atom) by the interaction of the formula (1) compound with thionylchloride in the presence of triethylaminehalogenide.

EFFECT: formula (1) compound as an intermediate for obtaining pharmaceutical and agrochemical substances.

4 cl, 17 ex