Nucleophilic Substitution of η5-Pyrrolyl Ligands in Ruthenium(II) Complexes

Autor:	M. Rakowski DuBois, Bruce C. Noll, and C. Ohman, K. G. Parker
Rok vydání:	1997
Předmět:	Substitution reaction Ligand Hydride Aryl Organic Chemistry chemistry.chemical_element Protonation Medicinal chemistry Ruthenium Inorganic Chemistry chemistry.chemical_compound chemistry Nucleophilic substitution Organic chemistry Physical and Theoretical Chemistry Pyrrole
Zdroj:	Organometallics. 16:2325-2334
ISSN:	1520-6041 0276-7333
DOI:	10.1021/om9700268
Popis:	The reaction of RuCl2(PPh3)3 with pyrrolyllithium results in the formation of the pyrrolyl complex (NC4H4)RuCl(PPh3)2, 1, which has been characterized by an X-ray diffraction study. The structure confirms the η5-bonding mode for the pyrrolyl ligand. Ligand substitution reactions with 1 have led to the facile synthesis of related η5-pyrrolyl ruthenium complexes with other suppporting ligands. Reactions of the PEt3 derivatives (NC4H4)RuX(PEt3)2, X = Cl and I, with aryl- and alkyllithium reagents resulted in nucleophilic substitution of the pyrrolyl ligand accompanied by hydrogen transfer to the metal ion, forming (2-RNC4H3)RuH(PEt3)2. The hydride products could be converted to the corresponding chloride derivatives in chlorinated solvents, and the complex (2-PhNC4H3)RuCl(PEt3)2 has been structurally characterized. A second nucleophilic substitution reaction on the coordinated pyrrolyl ligand has been characterized in some cases, and protonation of the substituted pyrrole complex led to isolation of the free...
Databáze:	OpenAIRE
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