Palladium-Catalyzed Cross-Coupling of Aryl Electrophiles with Dimethylalkynylaluminum Reagents

Alkynyldimethylaluminum reagents are easily available from terminal akynes and trimethylaluminum via a triethylamine-catalyzed metalation. These compounds can react with various aromatic and heterocyclic halides in the presence of palladium in a fast and efficient way. This catalyzed cross-coupling reaction provides a simple entry to numerous internal alkynes, using a readily available, inexpensive, and nontoxic metalating agent.