A Straightforward Approach to Tetrahydroindolo[3,2-<i>b</i>]carbazoles and 1-Indolyltetrahydrocarbazoles through [3+3] Cyclodimerization of Indole-Derived Cyclopropanes
作者:Olga A. Ivanova、Ekaterina M. Budynina、Victor N. Khrustalev、Dmitriy A. Skvortsov、Igor V. Trushkov、Mikhail Ya. Melnikov
DOI:10.1002/chem.201502287
日期:2016.1.22
A rapid new approach to produce biologically relevant bisindoles, namely indolyltetrahydrocarbazoles and indolo[3,2‐b]carbazoles, has been developed, based on the Ga(OTf)3‐catalyzed [3+3] cyclodimerization of indole‐derived donor–acceptor cyclopropanes. Chemoselectivity of the process depends on the location of the three‐membered ring at the indole core.
基于由吲哚衍生的供体-受体的Ga(OTf)3催化的[3 + 3]环二聚作用,已开发出一种快速的新方法来生产生物学相关的双吲哚,即吲哚基四氢咔唑和吲哚[3,2- b ]咔唑。环丙烷。该过程的化学选择性取决于三元环在吲哚核上的位置。
Domino Cyclodimerization of Indole-Derived Donor-Acceptor Cyclopropanes: One-Step Construction of the Pentaleno[1,6-a,b]indole Skeleton
作者:Olga A. Ivanova、Ekaterina M. Budynina、Alexey O. Chagarovskiy、Eduard R. Rakhmankulov、Igor V. Trushkov、Alexander V. Semeykin、Nikolay L. Shimanovskii、Mikhail Ya. Melnikov
DOI:10.1002/chem.201101687
日期:2011.10.10
The fellowship of the rings: The previously undiscovered ability of indole‐derived donor–acceptorcyclopropanes to involve four reaction centers simultaneously was revealed by their dominocyclodimerization (see scheme). This SnCl4‐induced reaction affords bisindole products with the pentaleno[1,6‐a,b]indole framework. In the course of this process, two new rings, three CC bonds, and four stereocenters