Programmed Synthesis of Tetraarylthiophenes through Sequential C-H Arylation

被引:211
|
作者
Yanagisawa, Shuichi [1 ]
Ueda, Kirika [1 ]
Sekizawa, Hiromi [1 ]
Itami, Kenichiro [1 ]
机构
[1] Nagoya Univ, Grad Sch Sci, Dept Chem, Nagoya, Aichi 4648602, Japan
关键词
PALLADIUM-CATALYZED ARYLATION; CROSS-COUPLING REACTIONS; HETEROAROMATIC-COMPOUNDS; BOND FORMATION; FUNCTIONALIZATION; THIOPHENES; ACIDS; HETEROARENES; DERIVATIVES; ACTIVATION;
D O I
10.1021/ja906215b
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A general protocol for the programmed synthesis of tetraarylthiophenes has been established. The utilization of three catalysts, RhCl(CO){P[OCH(CF3)(2)](3)}(2), PdCl2/P[OCH(CF3)(2)](3), and PdCl2/bipy, enables regioselective sequential arylations at the three C-H bonds of 3-methoxythiophene with iodoarenes. Interesting metal- and ligand-controlled regiodivergent: C-H arylations have been uncovered during this study. The installation of fourth aryl groups to the thus-generated 2,4,5-triaryl-3-methoxythiophenes has been accomplished through a sequence of demethylation, triflation, and Suzuki-Miyaura coupling.
引用
收藏
页码:14622 / +
页数:3
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