Abstract
| - Tandem alkylation/cyclization of indenopyrrolocarbazole 4a, a C12 carbon analogue of indolocarbazole K252c, was carried out by general solid-phase and solution-phase methods. Alkylation offused pyrroloindenylcarbazole 4a derivatives with appropriate monoacetals of diketones affordedthe corresponding C12-substituted acetal alcohols. Acid-catalyzed cyclization of these adducts yieldedC12,N13-bridged tetrahydrofuran, pyran, and dioxane compounds 10−13.
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