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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