Imidazol-Farbstoffe XIV. Nitrierung von 1,2-Benzoylenbenzimidazol

Arient, J.; Šlosar, J.; Havlíčková, L.

doi:10.1135/cccc19651913

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2007

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“…Under severe conditions the 5',6'-dinitro derivative 73a is the major product, and the 4',6'-disubstituted acid 73b is the minor product. When compounds 72a,b were heated in acetic anhydride the corresponding cyclization products 6-and 8-nitro-substituted isoindolobenzimidazolones 4c,d were obtained [86]. show that the lactam ring in the isoindolo[2,1-a]benzimidazol-11-one system 4a is a labile unit and is readily opened during various transformations.…”

Section: Nitrationmentioning

confidence: 98%