A strategy for the stepwise ring annulation of all four pyrrolic rings of a porphyrin
Literature Information
Tony Khoury, Maxwell J. Crossley
The repeated introduction of an α-dione unit and its reaction with an arene-1,2-diamine allows the stepwise annulation of all four pyrrolic rings of a porphyrin, as is demonstrated by the synthesis of a trisquinoxalinoporphyrin, a tetrakisquinoxalinoporphyrin and the more elaborated bisporphyrin.
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