title: Zinc-catalyzed [4+3] cycloaddition with concomitant furan annulation: formation of cyclohepta[b]furans.
abstract: A convenient zinc-promoted [4+3] cycloaddition of a carbonyl ene-yne with simple dienes was first achieved. This reaction provided an efficient strategy to prepare various cyclohepta[b]furan rings by cascade cycloadditions. Additionally, a multicomponent reaction of dione, alkynal, and diene was also reported, which exhibited a novel strategy for selective creations of C-O bonds and C-C bonds.
authors.affiliation: State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000 (P.R. China).
authors.forename: Bo
authors.initials: B
authors.lastname: Song
authors.forename: Lian-Hua
authors.initials: LH
authors.lastname: Li
authors.forename: Xian-Rong
authors.initials: XR
authors.lastname: Song
authors.forename: Yi-Feng
authors.initials: YF
authors.lastname: Qiu
authors.forename: Mei-Jin
authors.initials: MJ
authors.lastname: Zhong
authors.forename: Ping-Xin
authors.initials: PX
authors.lastname: Zhou
authors.forename: Yong-Min
authors.initials: YM
authors.lastname: Liang
mesh_terms: D002384:Catalysis; D061565:Cycloaddition Reaction; D005663:Furans / Q000138:chemical synthesis* / Q000737:chemistry; D006571:Heterocyclic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D015032:Zinc / Q000737:chemistry*
chemical_list: D005663:Furans; D006571:Heterocyclic Compounds; D015032:Zinc; C039281:furan
keywords: carbocations; cycloadditions; heterocycles; tandem cyclization; zinc catalysis