作者:Zhi-Min Zong、Wei-Hong Zhang、Qun Jiang、Jin Lu、Xian-Yong Wei
DOI:10.1246/bcsj.75.769
日期:2002.4
The photochemical reactions of 1,2,3,4-tetrahydronaphthalene (THN), 9,10-dihydrophenanthrene (DHP), 9,10-dihydroanthracene (DHA), and acenaphthene (AN) with N-bromosuccinimide (NBS) were investigated under N2 atmosphere at room temperature. The results show that the relative reactivities of the hydroarenes toward a photochemical reaction with NBS are THN < DHP < AN << DHA, which is consistent with the stabilities of the radicals produced by benzylic hydrogen abstraction from the hydroarenes. Photochemical reactions of THN and DHP mainly afforded dehydrogenated products, while the photobrominations of the dehydrogenated products from AN and DHA with NBS proceeded readily.
在室温下、氮气氛围中研究了1,2,3,4-四氢化萘(THN)、9,10-二氢菲(DHP)、9,10-二氢蒽(DHA)与苊(AN)和N-溴代丁二酰亚胺(NBS)的光化学反应。结果表明,相对于NBS光化学反应而言,以上各物质的反应活性顺序为THN < DHP < 苊 < < DHA,这与各物质苄基氢抽提所得自由基的稳定性一致。THN、DHP的光化学反应机理以脱氢为主,而AN、DHA脱氢所得产物的光溴化反应则容易地进行。