期刊
JOURNAL OF ORGANOMETALLIC CHEMISTRY
卷 843, 期 -, 页码 14-19出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jorganchem.2017.05.018
关键词
Iridium complex; 2-Pyridonate ligand; Acceptorless dehydrogenation of alcohol; Catalytic performance
资金
- Kyoto University
- JSPS [JP16H01018]
- Asahi Glass Foundation
- [26288047]
- Grants-in-Aid for Scientific Research [16H01018] Funding Source: KAKEN
A series of Cp*Ir complexes bearing 5- and 4,5-substituted 2-pyridonate ligands have been synthesized and their catalytic performance for acceptorless dehydrogenation of alcohols has been investigated under neutral conditions. Electron-withdrawing groups such as methoxycarbonyl, trifluoromethyl, cyano, and nitro groups at the 5-position promoted the acceptorless dehydrogenation of 1-phenylethanol, whereas electron-donating methyl group at the 5-position retarded the reaction. Furthermore, introduction of methyl group at the 4-position improved the catalytic performance. Thus, Cp*Ir(5-trifluoromethyl-4-methyl-2-pyridonate)Cl (2bc) exhibited the highest catalytic performance among the complexes examined, and also showed good catalytic performance for acceptorless dehydrogenation of primary alcohols. (C) 2017 Elsevier B.V. All rights reserved.
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