| abstract |
FIELD: chemistry.SUBSTANCE: present invention relates to a method of producing a pyrazole compound of formula V, in which Rmeans H, and other radicals and symbols have definitions given in the claim. Disclosed method comprises cyclisation of hydrazone-substituted α,β-unsaturated carbonyl compound of formula IV by reacting with a reagent containing a group R, which is a reducing agent which is selected from ion hydride donors selected from a group consisting of complex boron and aluminum hydrides. Compounds of formula V are universal reaction tools for producing substances of fine organic synthesis - pyrazole derivatives and, in particular, herbicides. Present invention also relates to pyrazole compounds of formulas Va and Vc.EFFECT: technical result is the development of a regioselective method of producing N-substituted pyrazoles.9 cl, 4 tbl, 4 ex |