Abstract
The Sonogashira coupling of terminal alkynes and aryl bromides with aqueous ammonia catalyzed by the in situ formed palladium complex of a bulky alkylphosphine furnishes the coupling product at room temperature. One-pot reaction of the Sonogashira coupling and the following intramolecular cyclization with 2-hydroxy or 2-amino aryl bromide leads to a facile synthesis of benzofuran and indole derivatives.
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