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
Rhodium‐Catalyzed Vinyl Sulfonylation of 3‐Carbonyl‐Substituted Indoles with Ethenesulfonyl Fluoride by Cross‐Dehydrogenative Coupling: An Application in (3+2) Cycloaddition
作者:K. Sandeep、A. Sanjeeva Kumar、K. C. Kumara Swamy
DOI:10.1002/ejoc.202201037
日期:2022.11.18
An aldehyde-directed, Rh(III)-catalyzed site-selective C(4)−H vinylsulfonylation of indoles with ESF (Ethene SulfonylFluoride) is reported. Potential synthetic utility of the products is demonstrated by using click chemistry to access indole C4-appended triazoles.
Palladium‐Catalyzed C3‐Carbaldehyde Directed Regioselective C2‐Thioarylation of Indoles
作者:Sandip Kumar Gupta、Niranjan Panda
DOI:10.1002/asia.202400272
日期:2024.6.3
directing potential of weakly coordinating aldehyde group present at 3-position of indole was exploited for regioselective C2-H thioarylation over the possible C4-H functionalization. Mechanistic studies reveal that the process involves initial generation of thioaryl radical followed by sequential C−H activation, thiolate transfer, and reductiveelimination.