Gold‐ and Indium‐Catalyzed Synthesis of 3‐ and 6‐Sulfonylindoles from ortho‐Alkynyl‐N‐sulfonylanilines

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-catalyzed aminosulfonylation of 2-alkynyl-6-methoxy-N-sulfonylanilines 1 (R1=MeO) affords 6-sulfonylindoles 3 as the major products (see scheme). Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2007/z604038_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.