Preparation of [C,N,O]-Pincer Osmium Complexes by Alkylidene Metathesis with a Methyl Group of 2,6 Diacetylpyridine
Autores: Ricardo Castarlenas, Miguel A. Esteruelas y Enrique Oñate
Ref. revista: Organometallics, 26, 3082-3084, (2007)
The complex [(è6-p-cymene)OsCl(dCHPh)(IPr)]OTf (1) reacts with 2,6-diacetylpyridine in acetonitrile at 40 °C to give the [C,N,O]-pincer deriVatiVe [OsCl{3C,N,O-[dCHC(O)pyC(CH3)O]}(NCCH3)(IPr)]OTf (2), containing an alkylidene function at the terdentate ligand. Under the same conditions in dichloromethane, the neutral species OsCl(OTf){k3C,N,O- [dCHC(O)pyC(CH3)O]}(IPr) (3) is formed.
The complex [(è6-p-cymene)OsCl(dCHPh)(IPr)]OTf (1) reacts with 2,6-diacetylpyridine in acetonitrile at 40 °C to give the [C,N,O]-pincer deriVatiVe [OsCl{3C,N,O-[dCHC(O)pyC(CH3)O]}(NCCH3)(IPr)]OTf (2), containing an alkylidene function at the terdentate ligand. Under the same conditions in dichloromethane, the neutral species OsCl(OTf){k3C,N,O- [dCHC(O)pyC(CH3)O]}(IPr) (3) is formed.