Abstract
The reactions of cyanamide or cyanamide-dicyandiamide mixture in the presence of acid catalyst in inert solvents (phenol or pyridine-nitrobenzene mixture) were studied. Diguanylmelamine was obtained from cyanamide as a main product, whereas 1-amidino-2, 4, 6-triguanidino-dihydro-s-triazine ((1), a new compound) was obtained from cyanamide-dicyandiamide mixture. Triguanylmelamine was not formed directly through the above reactions, but formed quantitatively by an elimination reaction of cyanamide from (1) in an alkaline medium.Based on these results, mechanism of the formation of guanylmelamines was discussed. The effects of the experimental conditions, such as the reaction temperature and the amount of the acid, were also investigated.
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