Nickel-catalyzed highly regio- and stereoselective cyclization of oxanorbornenes with alkyl propiolates: A novel method for the synthesis of benzocoumarin derivatives

被引：0
|
作者：
Rayabarapu, DK [1 ]
Sambaiah, T [1 ]
Cheng, CH [1 ]
机构：
[1] Natl Tsing Hua Univ, Dept Chem, Hsinchu 300, Taiwan
来源：
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2001年 / 40卷 / 07期
关键词：
alkenes; coumarins; cyclization; nickel;
D O I：
10.1002/1521-3773(20010401)40:7<1286::AID-ANIE1286>3.0.CO;2-I
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
7-Oxabenzonorbornadienes bearing various substituents react with propiolates in the presence of [NiBr2(dppe)] (dppe = bis(diphenylphosphanyl)ethane) as a catalyst precursor and zinc powder to give benzocoumarin derivatives [Eq. (1)]. The one-pot reactions proceed at 80°C in acetonitrile, and the products are obtained in good yields with high regio- and stereoselectivity.
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收藏
页码：1286 / +
页数：4
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