A Magnetically Separable Heterogeneous Deallylation Catalyst: [CpRu(η<sup>3</sup>-C<sub>3</sub>H<sub>5</sub>)(2-pyridinecarboxylato)]PF<sub>6</sub>Complex Supported on a Ferromagnetic Microsize Particle Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>
The highly reactive and chemoselective homogeneousdeallylation catalyst CpRu(η3-C3H5)(4-substituted-2-pyridinecarboxylato) was immobilized on microsize spherical Fe3O4@SiO2 particles. The resultant heterogeneouscatalyst displays high saturation magnetization, weak coercive forces and high levels of dispersibility. The catalyst has increased the utility of deallylation by allowing the reaction to be
Pyrolysis of allyl ethers. Unimolecular fragmentation to propenes and carbonyl compounds
作者:R. C. Cookson、S. R. Wallis
DOI:10.1039/j29660001245
日期:——
about 500° allylethers undergo decomposition through a cyclic, six-atom transition state with transfer of a hydrogen atom to give high yields of a carbonylcompound and a propene, in which the double bond has moved from the 2,3- to the 1,2-position of the allyl system. The rate of reaction is rather insensitive to structural variation in either the allyl or alkyl part of the ether. Allyl α-deuterodiphenylmethyl
Practical palladium-mediated deprotective method of Allyloxycarbonyl in aqueous media
作者:Jean Pierre Geneˆt、Errol Blart、Monique Savignac、Stéphane Lemeune、Sandrine Lemaire-Audoire、Jean-Marc Paris、Jean-Marie Bernard
DOI:10.1016/s0040-4020(01)80771-7
日期:1994.1
esters, carbamates and carbonates by aqueous Pd (O) catalysed allyl transfer to diethylamine in aqueous media employing a water soluble phosphine. The allyl scavenger as well as by product allyl diethylamine are volatile and easily removed in vacuo. In a two phase system an increased selectivity is seen. The method has been successfully used for deprotection of a wide range of secondary amines or base