文献类型：期刊文献

英文题名：Visible Light Mediated Cyclization of Tertiary Anilines with Maleimides Using Nickel(II) Oxide Surface-Modified Titanium Dioxide Catalyst

作者：Tang, Jian[1];Grampp, Gunter[2];Liu, Yun[3];Wang, Bing-Xiang[4];Tao, Fei-Fei[1];Wang, Li-Jun[1];Liang, Xue-Zheng[1];Xiao, Hui-Quan[1];Shen, Yong-Miao[1]

机构：[1]Shaoxing Univ, Sch Chem & Chem Engn, Key Lab Clean Dyeing & Finishing Technol Zhejiang, Shaoxing 312000, Peoples R China;[2]Graz Univ Technol, Phys & Theoret Chem, A-8010 Graz, Austria;[3]Jiangsu Normal Univ, Sch Chem & Chem Engn, Jiangsu Key Lab Green Synthet Funct Mat, Xuzhou 221116, Jiangsu, Peoples R China;[4]Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Key Lab Biofunct Mat, Nanjing 210097, Jiangsu, Peoples R China

年份：2015

卷号：80

期号：5

起止页码：2724

外文期刊名：JOURNAL OF ORGANIC CHEMISTRY

收录：SCI-EXPANDED(收录号：WOS:000350841600026)、、EI(收录号：20151100626015)、Scopus(收录号：2-s2.0-84924310191)、WOS、CCR-EXPANDED(收录号：WOS:000350841600026)

基金：This work was supported by the National Natural Science Foundation of China (NSFC 21202101 and 51372154), the Zhejiang Provincial Natural Science Foundation of China (Y15B020012), and the Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province (AE201306).

语种：英文

外文关键词：Aniline - Catalyst activity - Cyclization - Metal complexes - Nickel oxide - Oxide minerals - Titanium dioxide - Transition metals

外文摘要：Surface-modified titanium dioxides by highly dispersed NiO particles have an extended absorption in the visible light region and a reduced hole-electron pair recombination than unmodified TiO2. They have now been successfully applied as highly active heterogeneous photocatalysts in the visible light mediated direct cyclization of tertiary anilines with maleimides to give tetrahydroquinoline products in moderate to high yields at ambient temperature. In contrast with unmodified titanium dioxide catalysts that are conventionally used in a stoichiometric amount in combination with UVA light, only a catalytic amount (1 mol %) of the surface-modified TiO2 catalyst is needed along with visible light to efficiently catalyze the reaction. Compared with transition-metal complexes such as Ru(bpy)(3)Cl-2 or Ir(ppy)(2)(dtbbpy)PF6, advantages of these surface-modified titanium dioxides as photocatalyst include high catalytic activity, low cost, ease of recovering, and being able to be used for at least nine times without significant decay of catalytic activity.