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 of fused pyrroloindenylcarbazole 4a derivatives with appropriate monoacetals of diketones afforded the corresponding C12-substituted acetal alcohols. Acid-catalyzed cyclization of these adducts yielded C12,N13-bridged
茚并
吡咯并
咔唑4a(
吲哚并
咔唑K252c的C12碳类似物)的串联烷基化/环化反应通过常规固相和溶液相方法进行。稠合的
吡咯并
茚基
咔唑4a衍
生物与合适的二酮单
缩醛烷基化,得到相应的C12-取代的
缩醛醇。这些加合物的酸催化环化反应生成C12,N13桥联的
四氢呋喃,
吡喃和
二恶烷化合物10-13。