title: New allene synthesis via carbocupration-zinc carbenoid homologation and beta-elimination sequence.
abstract: [reaction: see text] Polysubstituted propadienes are obtained in good to excellent yields by the consecutive carbocupration-homologation-beta-elimination reactions on the easily accessible alkynyl sulfoxides or sulfones. This one-pot reaction also allows the preparation of functionalized allenes.
authors.affiliation: Department of Chemistry and Institute of Catalysis Science and Technology, Technion-Israel Institute of Technology, Technion City, 32000 Haifa, Israel.
authors.forename: J P
authors.initials: JP
authors.lastname: Varghese
authors.forename: P
authors.initials: P
authors.lastname: Knochel
authors.forename: I
authors.initials: I
authors.lastname: Marek