667420-92-0Relevant articles and documents
The mechanism of the zirconium catalysed ethyl- and 2-magnesioethyl-magnesiation of unactivated alkenes
Lewis,Lewis, Dorian P.,Whitby,Whitby, Richard J.,Jones,Jones, Raymond V. H.
, p. 4541 - 4550 (1995)
Deuterium labelling experiments prove that the zirconocene dichloride catalysed ethylmagnesiation of alkenes occurs via a zirconocene η2-ethylene complex and allow a deuterium isotope effect for a key β-hydride transfer to be estimated (k(H)/k(D) = 2.5). Transmetallation from zirconium to magnesium to form 1,4-dimagnesiated reagents is shown to be an intramolecular process. Kinetic studies show that the reaction between η2-ethylene zirconocene and the alkene is rate limiting and that Lewis bases inhibit the reaction by decreasing the amount of η2-ethylene zirconocene in equilibrium with the 'ate' complex [Cp2Zr(CH2=CH2)Et]-.[MgX.Base]+.
Isoprene hydroamination catalyzed by palladium xantphos complexes
Tamaddoni Jahromi, Bahareh,Nemati Kharat, Ali,Zamanian, Sara,Bakhoda, Abolghasem,Mashayekh, Kobra,Khazaeli, Sadegh
experimental part, p. 188 - 196 (2012/09/07)
Pd(II) Xantphos or Xantphos chalcogenide complexes with general folmula [PdCl2(X∩X)] (where X = P, O, S or Se) were synthesized by the addition of corresponding ligands to [PdCl2(COD)] (COD = 1,5-cyclooctadiene). Prepared Complexes [
