Abstract
An investigation of the alkylation sites of 4,7-dihydroxybenzo[a]pyrrolo[3,4-c]carbazole-1,3(2H,8H)-dione, as well as the site of reduction in the maleimide upper ring, was carried out which resulted in the synthesis of diversely substituted 4-hydroxybenzo[a]pyrrolo[3,4-c]carbazoles. Moreover, the synthesis of 5,6-dicyano-1,4-dihydroxy-11H-benzo[a]carbazole was performed in which the maleimide ring of the above scaffold is missing and is replaced by electron-withdrawing nitrile groups.
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