(EN) Novel cyanocarboxamidines and a method for their preparation are disclosed. The use of these new cyanocarboxamidines as intermediates in the one step synthesis of antihypertensive 4-amino-2-(4-substituted-piperazine-1-yl)-quinozolines is also disclosed. (FR) Nouvelles cyanocarboxamidines et methode pour leur preparation. Utilisation de ces nouvelles cyanocarboxamidines en tant qu"intermediaires dans la phase de synthese des 4-amino-2- (piperazine-4-substituee-l-yl) quinazolines ayant une activite antihypertensive.