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Keywords:

  • Manganese;
  • Heterocycles;
  • Phosphorus;
  • Sulfur;
  • Radicals

Abstract

Phosphorus- or sulfur-centered radicals generated from the reaction of manganese(III) acetate with dialkyl phosphonates or arylthiols undergo selective additions to conjugated alkynes followed by cyclization and rearomatization to afford 2-phosphonyl- or 2-thioaryl-substituted indenones in fair to good yields.