Cobalt-catalyzed cyclotrimerization of diynes with norbornenes in one efficient step

被引：29

作者：

Wu, MS ^{[1
]}

Rayabarapu, DK ^{[1
]}

Cheng, CH ^{[1
]}

机构：

[1] Natl Tsing Hua Univ, Dept Chem, Hsinchu 300, Taiwan

来源：

TETRAHEDRON | 2004年 / 60卷 / 44期

关键词：

cyclotrimerization; cobalt catalysis; norbomene; diynes;

D O I：

10.1016/j.tet.2004.08.021

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

An efficient cobalt-catalyzed [2 + 2 + 2] cyclotrimerization of diynes and norbornene is described. Treatment of diyne with norbornene in the presence of CoI2(PPh3)(2) and zinc powder in 1,2-dichloroethane at 80degreesC for 12 h afforded [2 + 2 + 2] cyclotrimerization adduct exclusively in good yields. These cobalt-catalyzed results are in contrast to the ruthenium-catalyzed reaction of diyne with norbornene reported previously. (C) 2004 Elsevier Ltd. All rights reserved.

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页码：10005 / 10009

页数：5

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