A Straightforward Approach to Tetrahydroindolo[3,2-b]carbazoles and 1-Indolyltetrahydrocarbazoles through [3+3] Cyclodimerization of Indole-Derived Cyclopropanes

Dimerization is among the most challenging and fascinating reactions that, within one step, can provide a significant increase in structural complexity in a highly stereoselective manner. Indole-containing donor-acceptor cyclopropanes are appropriate candidates for dimerization reactions that provide rapid accesses to various biologically active bis-indole compounds. More information can be found in the Communication by E.M. Budynina, et al. (DOI: 10.1002/chem.201502287). © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.