title: Zirconocene-mediated macrocyclizations of diynes containing di-o-methylphenylene spacers.
abstract: The diynes 3,3',5,5'-tetramethyl-4,4'-di(pent-1-ynyl)biphenyl (4) and 3,3'',5,5''-tetramethyl-4,4''-di(hex-1-ynyl)terphenyl (9) undergo coupling with Cp(2)Zr(eta(2)-Me(3)SiC[triple bond]CSiMe(3))(py) to give dimeric macrocycles in moderate yields (16% for 4 and 26% for 9).
authors.affiliation: Department of Chemistry, University of California, Berkeley, California 94720-1460, USA.
authors.forename: Adam D
authors.initials: AD
authors.lastname: Miller
authors.forename: Jennifer L
authors.initials: JL
authors.lastname: McBee
authors.forename: T Don
authors.initials: TD
authors.lastname: Tilley