3-Methyl-4-phenylpyridazine, formation

Reaction of 1,2,3-triazines 1 with A iV-diethylprop-l-ynamine afforded mainly the N,N-di-ethylpyridin-2-amincs 7.17 284 285 When 4-phenyl-l,2,3-triazine (1, R = Ph R2 = R3 = H) was treated with /V,./V-diethylprop-l-ynamine the main product was MiV-diethyl-4-methyl-6-phenylpyridazin-3-amine (6). Its formation can be explained by an attack of A -.A -diethylprop-1-ynamine at N2 and C5 of l.284... 

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