The reaction of 2,4-diazido-s-triazines 1 with an equimolar amount or
a two-fold molar excess of ethyl cyanoacetate in the presence of triet
hylamine in DMF affords the corresponding mono-2 or diamino derivative
s of s-triazine 3; on heating 2,4-diazido-s-triazines 1a-d with a two-
fold molar excess of acetoacetone or ethyl acetoacetate in the presenc
e of triethylamine in ethanol the corresponding 1,2,3-triazolo-s-triaz
ines 4a-f are formed.