Bulletin of the Chemical Society of Japan p. 2987 - 2994 (1993)
Update date:2022-08-04
Topics:
Takeuchi, Atsuo
Komiya, Hitoshi
Tsutsumi, Takehiro
Hashimoto, Yukihiko
Hasegawa, Masaki
et al.
The photoreaction of 2,3-di<(E)-styryl>pyrazine derivatives was carried out in the crystalline state and in solution.Among them, 2,3-di(p-chlorostyryl)pyrazine an d2,3-di(p-cyanostyryl)pyrazine were photoreactive in the crystalline state and gave, upon photoirradiation, <2.2>orthocyclophanes in 76 and 58percent yields, respectively.Such a topochemical photo- behavior was interpreted on the basis of X-ray crystllographic analyses of the crystals.The photoirradiation of 2,3-distyrylpyrazine in solution gave <2.2>orthocyclophane and anti head-to-tail type monocyclic dimer as the major products.The yields of the products varied depending on the solvent; with decreasing the polarity of the solvent, the yield of the cyclophane decreased, whereas the yield of the monocyclic dimer increased.In a similar manner, the photoirradiation of the other 2,3-distyrylpyrazine derivatives in acetonitrile/chloroform (10/1) or acetonitrile gave the corresponding <2.2>orthocyclophanes and monocyclic dimers, respectively, as major products through two types of excimers.
View MoreShenyang NovPharm Technology Co., Ltd.
Contact:.+86-24-24165786
Address:Room 306, Hongjin Mansion, No. 36-1, Wanliutang Rd., Shenhe District, Shenyang, Liaoning, P.R.C.
ChangZhou XiaQing Chemical Co., Ltd.
Contact:+86-519-88721665
Address:3# Hengluo Road, Henglin Town, Changzhou City, Jiangsu Province,China
Zhengzhou Yuanli Biological Technology Co., Ltd.
Contact:+86-371-67897870/67897895
Address:No. 38, Qingyang Street, Zhengzhou, Henan, China
Dongguan Albiya Energy Science and Technology Co.,Ltd
Contact:+86-769-22181286
Address:Huanan Industial Park, Dongguan,China
Yixing Bluwat Chemicals Co., Ltd.
Contact:+86 510 87821568
Address:Yongan Road, Yixing Chemical Industrial Park, Yixing, Jiangsu, China
Doi:10.1080/00397911.2013.774019
(2013)Doi:10.1016/S0968-0896(00)00267-4
(2001)Doi:10.1021/jo01267a033
(1968)Doi:10.1021/jo9721195
(1998)Doi:10.1016/j.tetlet.2014.01.010
(2014)Doi:10.1021/jo402658h
(2014)