Palladium-catalyzed Direct C–H Bond Arylation of Simple Arenes with Aryltrimethylsilanes
作者:Kenji Funaki、Hiroshi Kawai、Tetsuo Sato、Shuichi Oi
DOI:10.1246/cl.2011.1050
日期:2011.9.5
Direct C–H bond arylation of arenes with aryltrimethylsilanes catalyzed by PdCl2 in the presence of CuCl2 as an oxidant has been developed. In addition to the role as the oxidant, CuCl2 is found to be necessary for the selective cross-coupling reaction.
We have discovered that the combination of Pd(OAc)(2)/o-chloranil can catalyze the direct C-H bond arylation of polycyclic aromatic hydrocarbons (PAHs) with arylboroxins that occurs selectively at the K-region. The sequential integration of Pd-catalyzed directarylation of PAHs and FeCl(3)-mediated cyclodehydrogenation is effective in rapidly extending a parent PAH π-system with high directionality
Selective transformations of phenylated diynes to polycyclic compounds by the RhCl3- and PtCl4-Aliquat 336® ion pair catalysts
作者:Waël Baidossi、Herbert Schumann、Jochanan Blum
DOI:10.1016/0040-4020(96)00394-8
日期:1996.6
The ionpairs generated from methyltricaprylammonium chloride and either RhCl3 or PtCl4 catalyze, under phase transfer conditions, selective cyclore-arrangements, as well as intra- and intermolecular addition processes by which discrete polycycliccompounds are formed. The nature of the products depends on the distances between the ethynyl functions and on the catalyst employed.
exo-(8bSR,8cSR,12bRS,12aSR)-8b,8c,11,12,12a,12b-Hexahydrobenzocyclobuta[1,2-e]pyrene and endo-(8bSR,8cSR,12bRS,12aRS)-8b,8c,11,12,12a,12b-hexahydrobenzocyclobuta[1,2-e]pyrene have been isolated; this is the first example of a 2πs+ 2πs photocycloaddition between cyclohexa-1,3-diene and 3pyrene.
exo-(8b SR,8c SR,12b RS,12a SR)-8b,8c,11,12,12a,12b-六氢苯并环丁[1,2- e ] py和内-(8b SR,8c SR,12b RS,分离出12a RS)-8b,8c,11,12,12a,12b-六氢苯并环丁[1,2- e ] py ;这是一个2π的第一示例小号+2π小号环己-1,3-二烯和之间光环3芘。