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タイトル: Dehydrogenative transformation of alcoholic substrates in aqueous media catalyzed by an iridium complex having a functional ligand with α-Hydroxypyridine and 4,5-Dihydro-1H-imidazol-2-yl Moieties
著者: Yoshida, Masato
Wang, Han
Shimbayashi, Takuya
Fujita, Ken Ichi
著者名の別形: 吉田, 真人
新林, 卓也
藤田, 健一
キーワード: dehydrogenation
iridium catalyst
functional ligand
alcohol
diol
ketone
lactone
water solvent
発行日: Aug-2018
出版者: MDPI AG
誌名: Catalysts
巻: 8
号: 8
論文番号: 312
抄録: A new catalytic system that employs water as an environmentally friendly solvent for the dehydrogenative oxidation of alcohols and lactonization of diols has been developed. In this catalytic system, a water-soluble dicationic iridium complex having a functional ligand that comprises α-hydroxypyridine and 4, 5-dihydro-1H-imidazol-2-yl moieties exhibits high catalytic performance. For example, the catalytic dehydrogenative oxidation of 1-phenylethanol in the presence of 0.25 mol % of the iridium catalyst and base under reflux in water proceeded to give acetophenone in 92% yield. Additionally, under similar reaction conditions, the iridium-catalyzed dehydrogenative lactonization of 1, 2-benzenedimethanol gave phthalide in 98% yield.
著作権等: © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
URI: http://hdl.handle.net/2433/236158
DOI(出版社版): 10.3390/catal8080312
出現コレクション:学術雑誌掲載論文等

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