METHOD OF OBTAINING WATER-SOLUBLE DIETHYLAMINE SALTS OF ARYL SULPHONYLUREAS Russian patent published in 2009 - IPC C07D251/42 C07D239/69 C07D401/04 A01N47/36 

FIELD: chemistry.

SUBSTANCE: method of obtaining water-soluble diethylamine salts of aryl sulphonylureas by formula (1): , where R₁-Cl, CF₃, COOCH₃, COOC₂H₅, CH₂CH₂CF₃, OCH₂CH₂Cl, OCH₂CH₂OCH₃, SO₂CH₂CH₃, CON(CH₃)₂;R₂-CH₃, OCH₃, OCHF₂, OC₂H₅; R₃-CH₃; OCH₃, OCHF₂, Cl, NHCH₃; R₄-H, CH₃; X-N, CH; Y-N, CH; M-(C₂H₅-NH-C₂H₅), includes interaction of equimolar quantities of proper aryl sulphonylurea and diethylamine in water medium with further separation of target product. As a rule interaction of initial reagents is carried out mainly at temperature 30-45°C, if necessary, in mother liquor medium, obtained after separating target product in previous cycle. Separation of product is usually realized by target product crystallisation or salting-out at temperature not more than 20°C.

EFFECT: possibility to use in agriculture as herbicidal means or in herbicidal compositions.

3 cl, 1 tbl, 7 ex