Tandem reactions of N,N-dialkylamides with organolithium compounds and cyclopentadiene. A new efficient synthesis of pentafulvenes

Abstract Reactions of N,N-dialkylamides with organolithium compounds followed by addition of cyclopentadiene furnish 6-mono- or 6,6-di-substituted pentafulvenes in moderate to high yields, providing a new and simple pentafulvene synthesis.