Ruthenium complexes of the type [RuX(Cp%)(PPh 3 ) 2 ] (X=Cl and H; Cp%=Cp, Cp\*, indenyl, and carboranyl) efficiently catalyse olefin cyclopropanation with diazoesters, and the cis/trans stereoselectivity of the resulting cyclopropanes strongly depends on the Cp% ligand. With [RuCl(Cp\*)(PAr 3 ) 2 ]
Olefin cyclopropanation reactions catalysed by novel ruthenacarborane clusters
β Scribed by A. Demonceau; E. Saive; Y. de Froidmont; A.F. Noels; A.J. Hubert; I.T. Chizhevsky; I.A. Lobanova; V.I. Bregadze
- Book ID
- 103405028
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- French
- Weight
- 232 KB
- Volume
- 33
- Category
- Article
- ISSN
- 0040-4039
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π SIMILAR VOLUMES
Bis(imido) chromium(VI) complexes are efficient catalysts for promoting the cyclopropanation of activated monosubstituted olefins with ethyl diazoacetate. 2,2'-Disubstituted activated olefins and non-activated ~-and cyclo-olefins, however, are much less reactive.
Ruthenium-arene complexes containing phosphines with pendent aryl groups [RuCI2(rl6-p-cymene) -(PCy2(CH2)3Ar)], Ar = C6H5 and 3,5-(CH3)2-C6H 3 (1 and 3), and the resulting chelating complexes [RuC12(PCy2-(CH2)3-'q6-Ar)] (2 and 4) mediate the cyclopropanation of olefins with ethyl diazoacetate. Compa
Novel ruthenium complexes with anionic phosphine ligands were found to be efficient in the catalytic cyclopropanation reaction of olefins with ethyl diazoacetate.
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