Expedient Access to Indolyl-Substituted Tri- and Diarylmethanes and (±)-Colletotryptin E by Silica Sulfuric Acid Catalyzed Transindolylation
作者:Jaray Jaratjaroonphong、Jirapat Yimyaem、Chayamon Chantana、Suthimon Boonmee
DOI:10.1055/s-0040-1719915
日期:2022.9
nonsymmetrical bis(indolyl)methanes (BIMs) through transindolylation of readily available symmetrical 3,3′-BIMs with various indoles catalyzed by silica-supported sulfuric acid has been established. This approach not only provides a useful strategy for the synthesis of structurally diverse BIMs, but also provides examples of nucleophilic substitution of BIMs with aromatic and nonaromatic π-systems
已经建立了通过容易获得的对称 3,3'-BIM 与由二氧化硅负载的硫酸催化的各种吲哚的转吲哚反应来获得一系列非对称双(吲哚基)甲烷(BIM)的便捷途径。这种方法不仅为合成结构多样的 BIMs 提供了一种有用的策略,而且还提供了用芳香族和非芳香族 π-体系对 BIMs 进行亲核取代的例子,从而形成了一个吲哚基取代的三芳基甲烷和二芳基甲烷库。此外,该方法成功应用于首次三步全合成2,3'-BIM生物碱(±)-colletotryptin E,总收率为46%。该过程的特点包括无金属工艺、廉价且环保的催化剂、温和的反应条件、广泛的官能团耐受性、良好的收率、