Phosphines having a 2,3,4,5-tetraphenylphenyl moiety: Effective ligands in palladium-catalyzed transformations of aryl chlorides

被引:91
作者
Iwasawa, Tetsuo
Komano, Tomoko
Tajima, Atsunori
Tokunaga, Makoto
Obora, Yasushi
Fujihara, Tetsuaki
Tsuji, Yasushi [1 ]
机构
[1] Kyoto Univ, Dept Energy & Hydrocarbon Chem, Grad Sch Engn, CREST,Japan Sci & Technol Agcy, Kyoto 6158510, Japan
[2] Hokkaido Univ, Catalysis Res Ctr, Sapporo, Hokkaido 0010021, Japan
关键词
D O I
10.1021/om060615q
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Three new triarylphosphines were prepared that have a 2,3,4,5-tetraphenylphenyl (TPPh) moiety on one of the phenyl rings (at the ortho, meta, or para position) of triphenylphosphine. Among them, the ortho derivative is particularly effective to utilize unactivated aryl chlorides in three different palladium-catalyzed reactions, i.e., Suzuki-Miyaura coupling, Mizoroki-Heck reaction, and silylation with Me3SiSiMe3. On the other hand, the corresponding meta and para derivatives are not effective as ligands at all in these catalytic reactions. X-ray crystal structures of Pd(0) complexes having the effective phosphines (ortho derivatives) as ligands show that eta(2)-coordination on the TPPh moiety is general and operative to realize a highly active catalyst system.
引用
收藏
页码:4665 / 4669
页数:5
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