Abstract
In our search for a light-emitting material suitable for an elcctroluminescent display2.6), our attention was directed to pyrene <brivatives, as pyrene is strongly fluorescent. I,2-Diaminopyrene is a useful starting compound for heterocyc1e-annelated pyrenes, which are expected to exhibit <bcper-colorcd fluorescence than pyrene itself. Recently, the authors have <bvelopcd a preparative method for aromatic vicinal diamines by reduction of 1,2,5-thiadiazolo aromatics.•)
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