Zirconocene-mediated macrocyclizations of diynes containing di-o-methylphenylene spacers.
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).
Miller
Adam D
AD
Department of Chemistry, University of California, Berkeley, California 94720-1460, USA.
McBee
Jennifer L
JL
Tilley
T Don
TD