- Ruthenium(II) η6-arene complexes containing a dinucleating ligand based on 1,8-naphthyridine
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Ruthenium arene complexes, [(η6-p-cymene)2Ru2(L)Cl2](PF6)2 [3b, L = 2, 7-bis(di-2-pyridinyl)-1,8-naphthyridine] and [(η6-p-cymene)Ru(L′)Cl](PF6) [4, L′ = tri(2-pyridinyl)amine], were synthesized and characterized by spectroscopic and analytical techniques. The molecular structure of [(η6-p-cymene)2Ru2(L)Cl2]Cl2 (3a) was further determined by single-crystal X-ray analysis. The use of these ruthenium complexes as pre-catalysts for oxidative coupling of 1,2-diols/1,2-aminoalcohol with o-phenylenediamines leading to quinoxalines was investigated. Complex 3b appeared to be a good catalyst for this transformation.
- Tang, Wei-Hung,Liu, Yi-Hung,Peng, Shie-Ming,Liu, Shiuh-Tzung
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- Use of a domestic microwave oven in organometallic chemistry
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Examples are presented to illustrate the great reduction in reaction time which is possible when reactions such as metallation of aromatic rings, ligand redistribution reactions, ligand synthesis, and reactions of metallo-organic species such as Al(OPri)3 with diols are carried out in PTFE containers in a conventional domestic microwave oven.Yields are generally of the same order as those obtained via conventional methods.The results suggest a significant potential value of microwave heating in organometallic chemistry.
- Ali, Mushtaq,Bond, Stephen P.,Mbogo, Shaaban A.,McWhinnie, William R.,Watts, Philip M.
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- Selective one-pot synthesis of symmetrical and unsymmetrical di- and triarylamines with a ligandless copper catalytic system
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The one-pot synthesis of symmetrical or unsymmetrical di- or triarylamines using aryl iodides or bromides and LiNH2 as ammonia source is reported. This highly selective method is based, for the first time, on a copper-catalyzed system, which does not require the presence of any additional ligand.
- Tlili, Anis,Monnier, Florian,Taillefer, Marc
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supporting information; experimental part
p. 6408 - 6410
(2012/07/27)
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