Toward Antikekulene: Angular 1,2-Di-, 2,3-Di-, and 1,2,15,16-Tetrachloro[6]phenylene
Toward Antikekulene: Angular 1,2-Di-, 2,3-Di-, and 1,2,15,16-Tetrachloro[6]phenylene
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DOI:
10.1055/s-0034-1379140
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发表时间:
2014-10-01
期刊:
影响因子:
2
通讯作者:
Vollhardt, K. Peter C.
中科院分区:
文献类型:
--
作者:
Fonari, Alexandr;Roeder, Jens C.;Vollhardt, K. Peter C.
The synthesis of the first ring-functionalized heliphenes is described, comprised of angular 1,2-di-, 2,3-di-, and 1,2,15,16-tetrachloro[6] phenylene, via a series of Sonogashira couplings and cobalt-catalyzed alkyne cyclotrimerization steps. These molecules are explored as potential precursors to antikekulene and their reactivity compared to that of the parent angular [6] phenylene. An Xray structural determination of 1,2,15,16-tetrachloro[6] phenylene reveals a structure with a considerably larger helical separation than in [6] phenylene, caused by the bulk of the appended chlorine atoms.