Palladium-catalyzed self-coupling reaction of terminal alkynes in the presence of p-chloranil: A practical method for the synthesis of triethynylethenes

摘要

Pd-catalyzed reaction of aliphatic-1-alkynes in the presence of p-cbloranil afforded triethynylethenes as exclusive self-coupling products in good yields. On the other hand, diynes were obtained when aromatic alkynes were used.