1,3,6,9,12,14,17,20-Octaethynyltetrabenz[<i>a</i>,<i>b</i>,<i>f</i>,<i>j</i>,<i>k</i>,<i>o</i>]-4,5,10,11,15,16,21,22- octadehydro[18]annulene: A Carbon-Rich Hydrocarbon
作者:Ognjen Š. Miljanić、Daniel Holmes、K. Peter C. Vollhardt
DOI:10.1021/ol051572x
日期:2005.9.1
Dodecaynes 1a-d have been prepared via a convergent strategy that employs Sonogashira couplings as the carbon-carbon bond-forming tool. Due to the steric bulk of the DMTS groups, 1c adopts a nonplanar conformation, the dynamics of which have been probed by VT-NMR. The cobalt-catalyzed isomerization of 1a,b produced the new conjugated phenylenes 2a,b and 3a,b, respectively.