Photobehaviour of 2- and 3-heteroaryl substituted o-divinylbenzenes; formation of fused 2,3- and 3,2-heteroareno-benzobicyclo[3.2.1]octadienes and 3-heteroaryl benzobicyclo[2.1.1]hexenes
作者:Dragana Vidaković、Irena Škorić、Margareta Horvat、Željko Marinić、Marija Šindler-Kulyk
DOI:10.1016/j.tet.2008.02.062
日期:2008.4
synthesised and their photochemical behaviour compared with 2-thienyl (7) and 2-furyl derivatives (2). Whereas the β-(2-heteroaryl) substituted o-divinylbenzenes (7 or 2) give only bicyclo[3.2.1]octadiene structure (14 or 1) by 1,6-ring closure of the biradical intermediate, β-(3-heteroaryl) substituted o-divinylbenzenes (8 or 9) give bicyclo[3.2.1]octadiene structure (23 or 24) and bicyclo[2.1.1]hexene structure
合成了新的邻二乙烯基苯(9)的β-3-噻吩基(8)和β-3-呋喃基衍生物,并与2-噻吩基(7)和2-呋喃基衍生物(2)进行了光化学行为的比较。而β-(2-杂芳基)取代的邻二乙烯基苯(7或2)通过双自由基中间体β-(3-的1,6-环闭合)仅产生双环[3.2.1]辛二烯结构(14或1)。杂芳基)取代的邻二乙烯基苯(8或9)给出双环[3.2.1]辛二烯结构(23或24)和双环[2.1.1]己烯结构(25或26)分别通过1,6-和1,4-环封闭。这种光化学方法为2,3-和3,2-稠合的噻吩和呋喃多环化合物提供了一种简单的方法。