Tetrahedron p. 3187 - 3194 (1988)
Update date:2022-08-03
Topics:
Maki, Yoshifumi
Shimada, Kaoru
Sako, Magoichi
Hirota, Kosaku
Irradiation of 2'-hydroxychalcones (3) with UV-visible light in the presence of heterocycle N-oxides such as pyrimido<5,4-g>pteridine N-oxide (I) results in the formation of the corresponding flavones (4) and flavanones (5).The photooxidative cyclisation of (3) induced by (1) to give (4) most efficiently occurred among the heterocycle N-oxides examined and could be reasonably explained by considering an initial single-electron oxidation of (3) by (1) under the photochemical conditions and subsequent intramolecular cyclisation.
View MoreLonzeal Pharmaceuticals Co., Ltd.
website:http://www.lonzeal.com
Contact:+86-13381011962
Address:RM 801, Yue MOMA, No. 26 Anningzhuang Rd. Haidian District, Beijing, China
Longhui qunfeng Chemical Co., Ltd
Contact:86-731-82173407
Address:South-east Industrial Park, Longhui County, Hunan Province, China
Shifang Taifeng New Flame Retardant Co., Ltd
Contact:02884721008
Address:tingjiang industrial park, hefeng town
Contact:+86-512-56795332
Address:No227 Shuanglong Rd, Fenghuang, Zhangjiagang
Ningbo Distant Chemicals Co.,Ltd
Contact:86-574-27862490,27862438
Address:5F-3,#54 DaShaNi street,Ningbo,CHINA
Doi:10.1016/S0040-4039(00)01337-X
(2000)Doi:10.1021/ja00271a082
(1986)Doi:10.1021/ja00538a024
(1980)Doi:10.1021/ja002038h
(2000)Doi:10.1039/b004450o
(2000)Doi:10.1055/s-1986-31793
(1986)
