| 摘要 |
FIELD: agricultural industry. ^ SUBSTANCE: herbicidal compound preparation method includes diethyl ethanol amine salt of N-1,3,5-triazinyl aminocarbonyl arylsulfonamide as an active compound expressed by the general formula: , where R1=Cl or COOCH3; R2=H or CH3; R3=OCH3 or N(CH3)2; R4=CH3, ONC(CH3)2 or ONC(CH3)C2H5, which are used in agricultural industry as herbicides and plant growth-regulating chemicals. Method includes condensation of arylsulphonyl isocyanate with substituted 1,3,5-aminotriazine in the organic solvent medium, treatment of reaction mixture containing N-1,3,5-triazinyl aminocarbonyl arylsulfonamide, and excess arylsulphonyl isocyanate and phosgene used as impurities, with aliphatic alcohol, and then with diethyl ethanol amine, water extraction of salt, cleaning filtration, separation of water layer and mixing of water layer containing the active compound with auxiliary components. Output is 98.3-99.6%. ^ EFFECT: improving product yield, manufacturing capacity and environmental safety of the process. ^ 2 cl, 1 tbl, 23 ex |
