Lamotrigine oxoanalog 8 was prepared using 5-(2-amino-5,6-dichlorophenyl)-6-azauracil 3 as starting compound. A series of 5-( 2,3-dichlorophenyl)-6-azauracil derivatives 9 - 12 with additional substituents in the benzene ring were synthesized as well. The conversion of hydrazone 13 to derivative 14 containing two 6- azauracil rings is also described.