The Benzyne Fischer-Indole Reaction
Donald McAusland, Sangwon Seo, Didier G. Pintori, Jonathan Finlayson and Michael F. Greaney*
*University of Edinburgh, School of Chemistry, Joseph Black Building, King's Buildings, West Mains Road, Edinburgh, EH9 3JJ, U.K., Email: michael.greaneyed.ac.uk
D. McAusland, S. Seo, D. G. Pintori, J. Finlayson, M. F. Greaney, Org. Lett., 2011, 13, 3667-3669.
see article for more reactions
The addition of N-tosyl hydrazones to arynes, generated through fluoride activation of 2-(trimethylsilyl)phenyl triflate precursors, leads to efficient N-arylation. Addition of a Lewis acid to the same reaction pot then affords N-tosylindole products via Fischer cyclization.
see article for more examples
Fischer Indole Synthesis, Indoles