Indole-ynones as Privileged Substrates for Radical Dearomatizing Spirocyclization Cascades

Nantachai Inprung, Hon Eong Ho, James A. Rossi-Ashton, Ryan G. Epton, Adrian C. Whitwood, Jason M. Lynam, Richard J. K. Taylor, Michael J. James, William P. Unsworth

Research output: Contribution to journalArticlepeer-review

Abstract

Indole-ynones have been established as general substrates for radical dearomatizing spirocyclization cascade reactions. Five distinct and varied synthetic protocols have been developed─cyanomethylation, sulfonylation, trifluoromethylation, stannylation and borylation─using a variety of radical generation modes, ranging from photoredox catalysis to traditional AIBN methods. The simple and easily prepared indole-ynones can be used to rapidly generate diverse, densely functionalized spirocycles and have the potential to become routinely used to explore radical reactivity. Experimental and computational investigations support the proposed radical cascade mechanism and suggest that other new methods are now primed for development.

Original languageEnglish
Pages (from-to)668-674
Number of pages7
JournalOrganic Letters
Volume24
Issue number2
DOIs
Publication statusPublished - 21 Jan 2022

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