Toyooka Genki, Fujita Ken-Ichi
Graduate School of Human and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan.
ChemSusChem. 2020 Aug 7;13(15):3820-3824. doi: 10.1002/cssc.202001052. Epub 2020 Jul 8.
A catalytic system for the synthesis of dicarboxylic acids from aqueous solutions of diols accompanied by the evolution of hydrogen was developed. An iridium complex bearing a functional bipyridonate ligand with N,N-dimethylamino substituents exhibited a high catalytic performance for this type of dehydrogenative reaction. For example, adipic acid was synthesized from an aqueous solution of 1,6-hexanediol in 97 % yield accompanied by the evolution of four equivalents of hydrogen by the present catalytic system. It should be noted that the simultaneous production of industrially important dicarboxylic acids and hydrogen, which is useful as an energy carrier, was achieved. In addition, the selective dehydrogenative oxidation of vicinal diols to give α-hydroxycarboxylic acids was also accomplished.
开发了一种用于从二醇水溶液合成二羧酸并伴有氢气释放的催化体系。带有具有N，N-二甲基氨基取代基的功能性联吡啶酮配体的铱配合物对这种类型的脱氢反应表现出高催化性能。例如，通过本催化体系，由1,6-己二醇水溶液以97％的产率合成己二酸，并伴有四当量氢气的释放。应当指出的是，实现了同时生产工业上重要的二羧酸和可用作能量载体的氢气。此外，还实现了邻二醇选择性脱氢氧化生成α-羟基羧酸。
