α-Benzoyl-and α-ethoxycarbonylcinnamonitrile derivatives 1a-c and ld-f reacted with benzamidine hydrochloride (2) in boiling pyridine to give the fully aromatized aryl-pyrimidine derivatives 3a-c and 6a-c respectively. In contrast the a-cyanocinnamonitrile derivatives 1g-j reacted with 2 under the same conditions to form the dihydropyrimidine derivatives 7a-d. Compounds 7a, b could be dehydrogenated to the fully aromatized analogues 8a, b as ...
