Base catalyzed rearrangement of π-conjugated sulfur and selenium bridged propargylic systems

Article abstract of DOI:10.1016/S0040-4020(01)00923-1

A series of novel π-conjugated bis-propargylic sulfides, selenides, sulfoxides and sulfones have been prepared. In the presence of amine bases these compounds underwent facile isomerization to the corresponding allenes, followed by a tandem cyclization an