2004年12月
Cross-coupling of triallyl(aryl)silanes with aryl bromides and chlorides: An alternative convenient biaryl synthesis
ADVANCED SYNTHESIS & CATALYSIS
- ,
- ,
- ,
- 巻
- 346
- 号
- 13-15
- 開始ページ
- 1715
- 終了ページ
- 1727
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1002/adsc.200404188
- 出版者・発行元
- WILEY-V C H VERLAG GMBH
Cross-coupling of a diverse range of aryl bromides with triallyl(aryl)silanes is effective in the presence of PdCl2/PCy3 and tetrabutylammonium fluoride (TBAF) in DMSO-H2O to give various biaryls in good yields. It is worthwhile to note that the all-carbon-substituted arylsilanes, stable towards moisture, acid, and base and easily accessible, serve as a highly practical alternative to their aryl(halo)silane counterparts. A catalyst system consisting of [(eta(3)-C3H5)PdCl](2) and 2-[2,4,6-(i-Pr)(3)C6H2]-C6H4PCy2 and use of TBAF- 3 H2O in THF-H2O are effective especially for the cross-coupling with aryl chlorides. Both of the catalyst systems tolerate a broad spectrum of common functional groups. The high efficiency of reactions is presumably due to the ready cleavage of the allyl groups upon treatment with TBAF(.)3 H2O and an appropriate amount of water. Diallyl(diphenyl)silane also cross-couples with various aryl bromides and chlorides in good yields, whereas allyl(triphenyl)silane gives the cross-coupled products in only moderate yields. Through sequential cross-coupling of bromo-chlorobenzenes with different arylsilanes, a range of unsymmetrical terphenyls are accessible in good overall yields.
- リンク情報
- ID情報
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- DOI : 10.1002/adsc.200404188
- ISSN : 1615-4150
- Web of Science ID : WOS:000225985800027