The new cinnamoyl derivatives (Za,b) were achieved~ reaction of the pyrazolo[l,5-c] 1,2,4-triazine derivative [1] with the appropriate aldehyde. The cinnamoyl moiety of (Za,b) reacted with urea and thiourea to give the pyrimidine derivatives (4a-<1). On the other hand, when the reaction of (Za) with urea was conducted at milder reaction conditions the acyclic com­pound [3] was isolated. The pyrimidine derivative (5) was obtained upon reaction of (2a) with semi carbazide. Compounds (Za,b) reacted also with cyanoacetamide to yield the pyridine deriva­tives (6a) and (6b) respectively. The acyclic phenylhydrazine derivatives (7a,b) were isolated through the reaction of (Za,b) with phenylhydrazine. The reaction of (Za,b) with hydrazine hydrate leads to the formation of the pyrazolines (Sa,b).


L I IBRAHIEM ,S A S GHOZLAN ,