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Diiodination of Alkynes in Supercritical Carbon Dioxide

โœ Scribed by Li Jin-Heng; Xie Ye-Xiang; Yin Du-Lin; Jiang Huan-Feng

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
211 KB
Volume
21
Category
Article
ISSN
0256-7660

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โœฆ Synopsis

Abstract

A general, green and efficient method for the synthesis of __transโ€__diiodoalkenes in CO~2~ (sc) has been developed. Transโ€diiodoalkenes were obtained stereospecifically in quantitative yields via diiodination of both electronโ€rich and electronโ€deficient alkynes in the presence of KI, Ce(SO~4~)~2~ and water in supercritical carbon dioxide [CO~2~(sc)] at 40 ยฐC.

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## 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 (93โ€‰% conver