Synthetic utility of ammonium salts in a Cu-catalyzed three-component reaction as a facile coupling partner

Jinho Kim, S. Yunmi Lee, Junseung Lee, Youngkyu Do, Sukbok Chang

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(Chemical Equation Presented) Ammonium salts were found to be a convenient and inexpensive reagent in the Cu-catalyzed three-component reaction with terminal alkynes and sulfonyl or phosphoryl azides leading to N-unprotected amidines. Thus obtained amidines bearing 2-bromobenzenesulfonyl moiety were efficiently cyclized by the Cu-catalyzed intramolecular N-arylation to give an important pharmacophore skeleton of 2H-1,2,4-benzothiadiazine 1,1-dioxides. Conveniently, two tandem catalytic procedures could be readily operated in one pot.

Original languageEnglish
Pages (from-to)9454-9457
Number of pages4
JournalJournal of Organic Chemistry
Issue number23
Publication statusPublished - 2008 Dec 5


All Science Journal Classification (ASJC) codes

  • Organic Chemistry

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