Efficient visible light photocatalysis of [2+2] enone cycloadditions

被引：919
|
作者：
Ischay, Michael A. [1 ]
Anzovino, Mary E. [1 ]
Du, Juana [1 ]
Yoon, Tehshik P. [1 ]
机构：
[1] Univ Wisconsin, Dept Chem, Madison, WI 53706 USA
来源：
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2008年 / 130卷 / 39期
关键词：
D O I：
10.1021/ja805387f
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We report that Ru(bipy)(3)Cl(2) can serve as a visible light photocatalyst for [2+2] enone cycloadditions. A variety of aryl enones participate readily in the reaction, and the diastereoselectivity in the formation of the cyclobutane products is excellent. We propose a mechanism in which a photogenerated Ru(bipy)(3)(+) complex promotes one-electron reduction of the enone substrate, which undergoes subsequent radical anion cycloaddition. The efficiency of this process is extremely high, which allows rapid, high-yielding [2+2] cyclizations to be conducted using incident sunlight as the only source of irradiation.
引用
收藏
页码：12886 / +
页数：3
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