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Hydrocarboxylation of Terminal Alkenes in Supercritical Carbon Dioxide

✍ Scribed by Clara Tortosa Estorach; Arantxa Orejón; Núria Ruiz; Anna M. Masdeu-Bultó; Gábor Laurenczy

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
187 KB
Volume
2008
Category
Article
ISSN
1434-1948

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✦ Synopsis

Abstract

The catalytic hydrocarboxylation of linear alkenes to carboxylic acids using supercritical carbon dioxide as a solvent was studied. High selectivities in acids have been obtained. The best results were achieved when adding a perfluorinated surfactant to the reaction mixture (93 % conversions and ca. 80 % selectivity). Comparative multinuclear high‐pressure NMR spectroscopic studies in [D~8~]THF and in supercritical CO~2~ show the formation of Pd^0^ species. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)

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## Abstract A general, green and efficient method for the synthesis of __trans‐__diiodoalkenes in CO~2~ (sc) has been developed. __Trans__‐diiodoalkenes were obtained stereospecifically in quantitative yields via diiodination of both electron‐rich and electron‐deficient alkynes in the presence of K