| abstract |
The known reaction of dichlorotriazines of the formula II, <IMAGE> in which Q is an ether or amino radical, with diamines of the formula III, Pip-NH-R-NH-Pip (III), in which Pip is a radical of the formula <IMAGE> where R¹ is hydrogen, C1-C12-alkyl, C3-C8-alkenyl, C7-C11-phenylalkyl, C2-C8-alkanoyl or C3-C5-alkenoyl, and R is a divalent organic radical leads to undesirable, poorly soluble by-products. The formation of these by-products can be suppressed if the reaction is carried out in a water-immiscible organic solvent with the addition of an aqueous base - preferably NaOH or KOH - under pressure at 140-220 ° C. |