title: Photoaddition reactions of acetylene and butadiyne derivatives to benzodithiophene.
abstract: The photochemical [2pi +2pi] cycloaddition of dimethyl acetylenedicarboxylate to benzo[1,2-b:4,5-b']dithiophene has been used to synthesize substituted cyclobuta[b]thieno[2,3-f][1]benzothiophene. The first [2pi + 2pi] photocycloaddition reaction of a series of butadiynes to benzodithiophene is reported to yield regioselective and acetylene-substituted cyclobutene derivatives containing an aromatic thiophene moiety.
authors.affiliation: Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio 43403, USA.
authors.forename: Brigitte
authors.initials: B
authors.lastname: Wex
authors.forename: Bilal R
authors.initials: BR
authors.lastname: Kaafarani
authors.forename: Allen G
authors.initials: AG
authors.lastname: Oliver
authors.forename: Jeanette A
authors.initials: JA
authors.lastname: Krause Bauer
authors.forename: Douglas C
authors.initials: DC
authors.lastname: Neckers