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Oxidative Annulation of Arenecarboxylic and Acrylic Acids with Alkynes under Ambient Conditions Catalyzed by an Electron‐Deficient Rhodium(III) Complex |
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| Authors: | Eiji Kudo Dr Yu Shibata Mutsumi Yamazaki Koji Masutomi Dr Yuta Miyauchi Miho Fukui Haruki Sugiyama Prof?Dr Hidehiro Uekusa Prof?Dr Tetsuya Satoh Prof?Dr Masahiro Miura Prof?Dr Ken Tanaka |
| Institution: | 1. http://www.apc.titech.ac.jp/～ktanaka/;2. Department of Chemical Science and Engineering, Tokyo Institute of Technology, Tokyo, Japan;3. Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Tokyo, Japan;4. Department of Chemistry, Tokyo Institute of Technology, Tokyo, Japan;5. Department of Applied Chemistry, Faculty of Engineering, Osaka University, Osaka, Japan;6. Department of Chemistry, Graduate School of Science, Osaka City University, Osaka, Japan |
| Abstract: | It has been established that an electron‐deficient CpE rhodium(III) complex catalyzes the oxidative 4+2] annulation of substituted arenecarboxylic and acrylic acids with alkynes under ambient conditions (at RT–40 °C, under air) without using excess amounts of substrates to produce the corresponding substituted isocoumarins and α‐pyrones in high yields. Minor modification of reaction conditions depending on the coordination ability of alkynes realized the high efficiency. |
| Keywords: | alkynes annulation isocoumarins rhodium α -pyrones |