期刊
JOURNAL OF ORGANOMETALLIC CHEMISTRY
卷 695, 期 6, 页码 875-881出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jorganchem.2010.01.007
关键词
Kojic acid; Mannich reaction; Ruthenium(II)-arene complexes; Stability studies; Synthesis
资金
- Hochschuljubil umsstiftung Vienna
- FFG Austrian Research Promotion Agency [811591]
- Austrian Council for Research and Technology Development [IS526001]
- Theodor-Korner-Fonds
- COST [D39, CM0902]
- Austrian Science Fund
- Marie Curie Intra European Fellowship [220890-SuRuCo]
Ru(II)-eta(6)-p-cymene compounds bearing pyrone-derived ligands, which were obtained by Mannich reaction with piperidine and related analogues, have been synthesized. The compounds were characterized by NMR spectroscopy, mass spectrometry, thermogravimetric analysis and in the case of 2-(2,6-dimethyl-morpholin-4-ylmethyl)-3-hydroxy-6-hydroxymethyl-pyran-4-one by X-ray diffraction analysis. The chlorido complexes are prone to aquation in aqueous solution which results in the formation of dimers. Dimer formation can be inhibited by in situ replacement of the chlorido ligand by imidazole yielding compounds which are significantly more stable in water, as demonstrated by H-1 NMR spectroscopy. (C) 2010 Elsevier B.V. All rights reserved.
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