title: Bidirectional iterative synthesis of alternating benzene-furan oligomers towards molecular wires.
abstract: Reaction of propargylic dithioacetal 2a with BuLi gives the sulfur-substituted allenyllithium 3a which is allowed to react with a dialdehyde to yield the corresponding alternating benzene-furan oligoaryls 6. Functional group transformation converts the ester groups in 6 to dialdehyde 8 which can be used for the synthesis of higher homologues towards molecular wires. A combination of this furan annulation, Heck reaction and Sonogashira coupling leads to a variety of benzene-furan-alkene/alkyne conjugated oligomers of precise length.
authors.affiliation: Institute of Chemistry, Academia Sinica, Department of Chemistry, National Taiwan University, Taipei, Taiwan.
authors.forename: Chin-Fa
authors.initials: CF
authors.lastname: Lee
authors.forename: Ching-Yuan
authors.initials: CY
authors.lastname: Liu
authors.forename: Hua-Can
authors.initials: HC
authors.lastname: Song
authors.forename: Shr-Jie
authors.initials: SJ
authors.lastname: Luo
authors.forename: Jui-Chang
authors.initials: JC
authors.lastname: Tseng
authors.forename: Hsi-Hua
authors.initials: HH
authors.lastname: Tso
authors.forename: Tien-Yau
authors.initials: TY
authors.lastname: Luh