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On the Regioselectivity Control in the Palladium-Catalyzed Hydro-alkoxycarbonylation of α,β-Unsaturated Esters

✍ Scribed by Giambattista Consiglio; Sylvia C. A. Nefkens; Carmelina Pisano; Fritz Wenzinger

Publisher
John Wiley and Sons
Year
1991
Tongue
German
Weight
170 KB
Volume
74
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

The regioselectivity of the hydro‐alkoxycarbonylation of methyl acrylate, methacrylate, and crotonate catalyzed by [PdCl~2~L~2~] complexes (L = phosphine ligands) can be largely controlled by variation of the ligands. PPh~3~, promotes preferential carbonylation at the α‐position, whereas with [(2,2‐dimethyl‐1,3‐dioxolane‐4,5‐diyl)bis‐(methylene)]bis[diphenylphosphine] as ligand, the β‐position is overwhelmingly carbonylated.

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