{"title":"Sc(OTf)3-Catalyzed Construction of Fused Bisindolylmethanes: Unified Access to 1,2- and 1,7-Linked Indole Frameworks.","authors":"Peng Long,Kang Dong,Xiaomeng Gong,Ruipeng Li,Huiwen Yang,Weiwei Zhang,Shouchu Tang","doi":"10.1021/acs.orglett.5c03698","DOIUrl":null,"url":null,"abstract":"We report a concise, efficient, and scalable synthetic strategy for the construction of fused bisindolylmethanes (BIMs) via Sc(OTf)3-catalyzed Friedel-Crafts cyclization of N-alkyl acetal indoles. This protocol enables regioselective access to both 1,2- and previously unexplored 1,7-fused BIMs under mild and operationally simple conditions. The transformation demonstrates broad substrate tolerance and excellent functional group compatibility, delivering structurally diverse fused indole architectures with potential relevance in medicinal chemistry, complex molecule synthesis, and late-stage peptide modification.","PeriodicalId":54,"journal":{"name":"Organic Letters","volume":"221 1","pages":""},"PeriodicalIF":5.0000,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Organic Letters","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1021/acs.orglett.5c03698","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, ORGANIC","Score":null,"Total":0}
引用次数: 0
Abstract
We report a concise, efficient, and scalable synthetic strategy for the construction of fused bisindolylmethanes (BIMs) via Sc(OTf)3-catalyzed Friedel-Crafts cyclization of N-alkyl acetal indoles. This protocol enables regioselective access to both 1,2- and previously unexplored 1,7-fused BIMs under mild and operationally simple conditions. The transformation demonstrates broad substrate tolerance and excellent functional group compatibility, delivering structurally diverse fused indole architectures with potential relevance in medicinal chemistry, complex molecule synthesis, and late-stage peptide modification.
期刊介绍:
Organic Letters invites original reports of fundamental research in all branches of the theory and practice of organic, physical organic, organometallic,medicinal, and bioorganic chemistry. Organic Letters provides rapid disclosure of the key elements of significant studies that are of interest to a large portion of the organic community. In selecting manuscripts for publication, the Editors place emphasis on the originality, quality and wide interest of the work. Authors should provide enough background information to place the new disclosure in context and to justify the rapid publication format. Back-to-back Letters will be considered. Full details should be reserved for an Article, which should appear in due course.