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Publikováno v:
The Journal of Organic Chemistry. 47:2196-2199
Publikováno v:
The Journal of Organic Chemistry. 18:1506-1510
Publikováno v:
Journal of Heterocyclic Chemistry. 17:409-411
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 imida