Palladium-mediated cyclopentanation of alkenes bearing a nucleophilic substituent. Stereochemistry and mechanism.
作者:Didier Bouyssi、Geneviève Balme、Guy Fournet、Nuno Monteiro、Jacques Gore
DOI:10.1016/s0040-4039(00)74293-6
日期:1991.3
The increased facility of the reaction 1 --> 2 simultaneously with the increased nucleophilicity of the malonate, as well as the stereospecificity observed in the case of 3, led to the conclusion that the cyclisation proceeds by a nucleophilic attack on the double bond activated by a palladium(II) species.
Formation de cyclopentanes a partir de malonates δ-ethyleniques par un processus catalytique en palladium(O) stereochimie et mecanisme
作者:Geneviève Balme、Didier Bouyssi、René Faure、Jacques Gore、Bruno Van Hemelryck
DOI:10.1016/s0040-4020(01)88469-6
日期:1992.1
the enolate of a σ-ethylenic malonate with an unsaturated ioded in the presence of a Palladium(O) complex leads stereospecifically to a cyclopentane with the simultaneous formation in a trans fashion of the two carbon—carbon bonds. All the results authorize to conclude that this cyclisation occurs by nucleophilic attack of the enolate onto the double bond activated by the σ-palladic unsaturated species