Gold- and indium-catalyzed synthesis of 3- and 6-sulfonylindoles from ortho-alkynyl-N-sulfonylanilines
(Chemical Equation Presented) Consecutive formation of C-N and C-S bonds: The gold-catalyzed intramolecular aminosulfonylation of 2-alkynyl-N- sulfonylanilines 1 (R1 = H) produces 3-sulfonylindoles 2 in good to high yields, whereas the indium-c