Pyrroloindoline natural products have attracted considerable interest because of both their biological activity and their unique structures.[1] Nature presumably produces these architecturally fascinating compounds through electrophilic cyclization cascades involving appropriately functionalized tryptamine and tryptophan precursors. In the laboratory, the use of chemical oxidants (eg, m-chloroperbenzoic acid, dioxirane, N-bromosuccinimide) to ...
[Kametani, Tetsuji; Ohsawa, Tatsushi; Ihara, Masataka Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1981 , p. 290 - 294]