Abstract The preparation of 5H, 10H-diimidazo [1, 2-a: 1′, 2′-d] pyrazine-5, 10-dione (2a) and its 2, 3, 7, 8-tetrabromo-and 2, 3, 7, 8-tetrachloro-analogs (2b and 2c, respectively) is reported. These dimers, when allowed to react with various anilines, afford imidazole-2- carboxamides (3a-c).
