| abstract |
FIELD: organic chemistry. SUBSTANCE: product: derivatives of hydrogenated N-substituted pyridines of the formula (I) given in description where: A - NH; R 1 - halogen; R 2 - halogen or cyano-group; R 3 - hydrogen, C 2 -C 5 -alkenyl, C 2 -C 5 -alkynyl, halogen, nitro-group; R 4 - hydroxycarbonyl or C 1 -C 5 -alkylhydroxycarbonyl, or A and R 4 form group -N-C(O). Reagent 1: isocyanate of the formula (II) given in description. Reagent 2: hydrogenated pyridine of the formula (III) given in description. Reaction conditions: in an aqueous medium, in the presence of base, at 0-20 C. Synthesized compounds were used in agriculture as herbicides. EFFECT: improved method of synthesis. 4 cl, 5 tbl |