Photohydrodimerization of 6-methoxyflavone to 6,6"-dimethoxy-2,2"-biflavanones

被引：8

作者：

Chen, AH ^{[1
]}

Kuo, WB ^{[1
]}

Chen, CW ^{[1
]}

机构：

[1] Natl Kaohsiung Normal Univ, Dept Chem, Kaohsiung 802, Taiwan

来源：

JOURNAL OF THE CHINESE CHEMICAL SOCIETY | 2004年 / 51卷 / 06期

关键词：

6-methoxyflavone; 6,6 ''-dimethoxy-2,2 ''-biflavones; 6-methoxyflavanone; photolysis; photohydrodimerization;

D O I：

10.1002/jccs.200400203

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

6-Methoxyflavone (7) easily afforded two hydrodimers of rac-6,6"-dimethoxy-2,2"-biflavanone (8a) and meso-6,6"-dimethoxy-2,2"-biflavanone (8b) and one reductive product of 6-methoxyflavanone (9) by using photolysis with the electron-donating amines including triethylamine, 2-(N,N-dimethylamino)ethanol Or N,N-dimethylaniline in solvents of acetonitrile, benzene or methylene dichloride. They were found to give higher yields of rac-6,6"-dimethoxy-2,2"-biflavanone (8a) and meso-6,6"-dimethoxy-2,2"-biflavanone (8b) (38.7% and 4.5%, 35.3% and 6.2%, respectively) in the reaction conditions of 1/10 molar ratio of 6-methoxyflavone (7) to triethylamine in a solvent of acetonitrile with irradiation of twenty-four hours by using 306 nm and 352 nm lamps.

引用

页码：1389 / 1394

页数：6

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