title: Visible-Light-Driven Intermolecular [2+2] Cycloadditions between Coumarin-3-Carboxylates and Acrylamide Analogs.
abstract: This paper reports a room temperature visible-light-driven protocol for the intermolecular [2+2] cycloadditions between coumarin-3-carboxylates and acrylamides analogs by an energy-transfer process. Using an iridium complex FIrPic as a photosensitizer and a 3 W blue LED as a light source, an array of cyclobutabenzocypyranones were prepared in moderate to excellent yields.
authors.affiliation: State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000 (P. R. China). liuqiang@lzu.edu.cn.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000 (P. R. China).|Key Laboratory of Eco-Environment-Related, Polymer Materials of Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070 (P. R. China).
authors.forename: Fu-Ping
authors.initials: FP
authors.lastname: Zhu
authors.affiliation: State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000 (P. R. China).
authors.forename: Xiao-Ling
authors.initials: XL
authors.lastname: Jin
authors.affiliation: State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000 (P. R. China).
authors.forename: Xiao-Ju
authors.initials: XJ
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000 (P. R. China).
authors.forename: Han
authors.initials: H
authors.lastname: Chen
authors.affiliation: Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, University of Chinese Academy of Sciences, Haidian District, Beijing, 100190 (P. R. China).
authors.forename: Li-Zhu
authors.initials: LZ
authors.lastname: Wu
keywords: cycloadditions; cyclobutanes; energy transfer; enones; photocatalysis