Abstract
A concise indium(III)‐catalyzed annulation of 2,3‐disubstituted indoles with o‐aminobenzyl alcohols is reported. The in situ generated aza‐ortho‐quinone methides (aza‐oQMs) were efficiently trapped by diverse carbazoles in a formal [4+2] cycloaddition reaction catalyzed by indium(III) triflate, which provided rapid access to bridged polycyclic indoline alkaloid skeletons.
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