Palladium-catalyzed double arylations of terminal olefins in acetic acid
作者:Daichao Xu、Chunxin Lu、Wanzhi Chen
DOI:10.1016/j.tet.2011.12.017
日期:2012.2
A palladium-catalyzed Heck diarylation of terminalolefins under ligand-free conditions in acetic acid is described. This procedure allows double arylation of terminalolefins affording trisubstituted olefins in good to excellent yields. The methodology is applicable to the coupling of both electron-deficient and electron-rich aryl iodides leading to symmetrical and unsymmetrical β,β-diarylated alkenes
The [(E,E,E)-1,6,11-tris(p-toluenesulfonyl)-1,6,11-triazacyclopentadeca-3,8,13-triene]Pd(0) complex in the hydroarylation of alkynes in ionic liquids. An approach to quinolines
The hydroarylation of alkynes can be successfully conducted in 1-butyl-3-methylimidazolium tetrafluoroborate ([bmin]BF4) in the presence of the [(E,E,E)-1,6,11-tris(p-toluenesulfonyl)-1,6.11-triacyclopentadeca-3 8,13-triene]Pd(0) complex. The catalytic ionic Solution can be recycled for reuse in subsequent reaction runs. The procedure has been applied to the preparation of 3-arylquinolines through a domino hydroarylation/cyclization process. (C) 2002 Elsevier Science Ltd. All rights reserved.