Journal of Organometallic Chemistry p. 91 - 102 (1994)
Update date:2022-08-04
Topics:
Naigre, Ruth
Chenal, Thomas
Cipres, Isabelle
Kalck, Philippe
Daran, Jean-Claude
Vaissermann, Jacqueline
A palladium precursor and SnCl2 as cocatalyst were used under 4 MPa of carbon monoxide for the catalytic alkoxycarbonylation of several monoterpenes into C11 esters.The active catalyst involves a palladium-hydride species whose formation was investigated.In the case of the model substrate 3-phenylpropene, the source of the hydrido ligand was determined to be the alkene itself.Allylic hydrogen abstraction seems to be a general way to produce the active hydridopalladium species since monoterpenes having labile allylic hydrogens were converted under exceptional mild conditions.An X-ray crystal structure analysis was carried out on <(Ph3PCH2CH=CHPh)4(PdCl6)(SnCl6)>. Key words: Palladium; X-ray structure; Terpenes; Carbonylation; Hydroesterification
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