title: Palladium-catalyzed divergent reactions of 1,6-enyne carbonates: synthesis of vinylidenepyridines and vinylidenepyrrolidines.
abstract: A method for preparing five- or six-membered heterocyclic compounds from enyne carbonates via palladium catalysis was developed. Enyne carbonates were transformed into 3-vinylidene-1-tosylpyridines 2 in the presence of PdI(2) as the catalyst. Using Pd(dba)(2) as the catalyst, 3-vinylidene-1-tosylpyrrolidines 3 were obtained. Further functionalizations of compounds 3 were carried out in a one-pot manner.
authors.affiliation: State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China.
authors.forename: Shu-Chun
authors.initials: SC
authors.lastname: Zhao
authors.forename: Ke-Gong
authors.initials: KG
authors.lastname: Ji
authors.forename: Lei
authors.initials: L
authors.lastname: Lu
authors.forename: Ting
authors.initials: T
authors.lastname: He
authors.forename: An-Xi
authors.initials: AX
authors.lastname: Zhou
authors.forename: Ru-Long
authors.initials: RL
authors.lastname: Yan
authors.forename: Shaukat
authors.initials: S
authors.lastname: Ali
authors.forename: Xue-Yuan
authors.initials: XY
authors.lastname: Liu
authors.forename: Yong-Min
authors.initials: YM
authors.lastname: Liang