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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 https://orcid.org/0000-0003-1520-5829 (unconfirmed) 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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