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Cyclopropanation of activated olefins catalysed by Ru-phosphine complexes

✍ Scribed by A. Demonceau; E.Abreu Dias; C.A. Lemoine; A.W. Stumpf; A.F. Noels; C. Pietraszuk; J. Gulinski; B. Marciniec


Publisher
Elsevier Science
Year
1995
Tongue
French
Weight
238 KB
Volume
36
Category
Article
ISSN
0040-4039

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πŸ“œ SIMILAR VOLUMES


Olefin cyclopropanation catalysed by nov
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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

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✍ Oscar Tutusaus; SΓ©bastien Delfosse; Albert Demonceau; Alfred F Noels; Rosario NΓΊ πŸ“‚ Article πŸ“… 2002 πŸ› Elsevier Science 🌐 French βš– 187 KB

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 catalysed by bis
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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.

Polymerisation of Acrylates Catalysed by
✍ Pascal M. Castro; Mikko P. Lankinen; Markku LeskelΓ€; Timo Repo πŸ“‚ Article πŸ“… 2005 πŸ› John Wiley and Sons 🌐 English βš– 142 KB

## Abstract **Summary:** Diphosphane complexes of iron(II) are active catalysts for the polymerisation of methyl acrylate (MA) monomers in the presence of methylaluminoxane (MAO). High molar mass atactic MA polymers ($\overline M \_{\rm n}$β€‰βˆΌβ€‰200 kg/mol) were obtained under mild conditions with rel