Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
230864 | The Journal of Supercritical Fluids | 2013 | 6 Pages |
To find out the conditions for mild hydration of carbon–carbon triple bonds the hydration reactions of some terminal alkynes (FcCCH, PhCCH, C5H11CCH) on the Nafion film in supercritical carbon dioxide (sc-CO2) were studied. The corresponding ketones were prepared in excellent yields. The hydration of 1-heptyne is accompanied by the isomerization of the terminal carbon–carbon triple bond into the internal one under acidic heterogeneous catalysis.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Nafion film hydrates terminal alkynes RCCH (RFc, Ph, C5H11) in sc-CO2 under mild conditions to give the respective ketones in excellent yields. ► The ecological compatibility and easy isolation of the reaction products are obvious advantages of this catalytic system. ► The terminal carbon–carbon triple bond in hept-1-yne was shown to migrate into the internal position under the acid heterogeneous catalysis conditions.