The performance of CpMo(CO) 3 CH 3 as a catalyst precursor in the epoxidation of cis-cyclooctene and R-(+)-limonene with tert-butylhydroperoxide (TBHP), at 55 • C, was investigated for the first time using microwave (MW)-assisted heating, and the results were compared with those obtained using conve
The stereospecific epoxidation of olefins catalysed by ruthenium
✍ Scribed by G. Balavoine; C. Eskenazi; F. Meunier; H. Rivière
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- French
- Weight
- 223 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
The h&a&&n A hteheunpec&Lc @t b&h CA and Ruthenium oxides are extremely powerful oxidising reagents which have been extensively used in oxidative transformations in organic chemistry'. These reactions involve the use either of a stoechiometric amount of ruthenium tetroxide, or more conveniently of a ruthenium compound in a catalytic quantity with a stoechiometric amount of a readily available oxidant. Many different catalyst-oxidant systems have been described, the most common of which involve RuC13,(H20), as catalyst and hypochlorite or periodate as oxidant. Generally, the reactions are conducted in a two-phase solvent system such asCC14-H20 Recently it has been shown by Sharpless that addition of acetonitrile as a cosolvent gives greatly improved results2.
📜 SIMILAR VOLUMES
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 ]
A synthetic strategy was developed to anchor an amino acid L-valine on to styrene-divinylbenzene co-polymer beads with 8% and 6% cross linking. The polymeric ligands containing bidentate N,O donor sites were treated with a solution of ruthenium(III) chloride to form the metal complex on the support.