METHOD OF PRODUCING CYCLIC DIKETONES Russian patent published in 2010 - IPC C07C49/443 C07C45/54 C07C45/67 C07C317/14 C07C315/04 C07D213/50 C07C23/10 C07C23/30 C07C23/32 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing cyclic 1,3-diketones which are carbonylated on position 2, having formula I in which Y denotes (Q₁),

where A₄ denotes CR_a1 or N-(O)_P, A₁ denotes CR₁R₂, A₂ denotes (CR₃R₄)_n, A₃ denotes CR₅R₆, Ra₁, Ra₂, Ra₃, Ra₄, Ra₅, R₁, R₂, R₃, R₄, R₅, R₆, p, n assume values given in the formula of invention, involving a) reacting the corresponding compound of formula II with a bromine or chlorine source to obtain a compound of formula III in which X denotes chlorine or bromine; b) reacting the formula III compound with water to obtain a compound of formula IV , c) converting the formula IV compound using a compound of formula V M⁺-O-C(O)-Y, in which M denotes a hydrogen cation or an alkali metal ion, an alkali-earth metal ion or an ammonium ion, into a compound of formula VI , and d) treating the formula VI compound with a cyanide source in the presence of a base.

EFFECT: method enables production of cyclic diketones with high output and good quality using a simple reaction and at a low cost.

3 cl, 9 ex