- Synthetic base stock based on Guerbet alcohols
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Guerbet (β branched) alcohols of varying chain length of even carbon numbers were synthesized by using single linear fatty alcohols ranging from 1-octanol to 1-dodecanol. All Guerbet alcohols having fewer than 28 carbon atoms and are liquid at 0 °C due to β branching. Synthetic base oils were prepared by reacting commonly available unsaturated fatty acids and dicarboxylic acids with Guerbet alcohols using p-toluenesulfonic acid as a catalyst. These base oils were characterized by physical and tribological properties like viscosity, viscosity index, pour point, flash point, wear scar, weld load, coefficient of friction etc. and compared with commercially available 150 and 500 N base oils.
- Waykole, Chetan,Bhowmick, Diptinarayan,Pratap, Amit
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p. 1407 - 1416
(2014/08/18)
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- Guerbet reaction of primary alcohols leading to β-alkylated dimer alcohols catalyzed by iridium complexes
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[IrCl(cod)]2 and [Cp*IrCl2]2 complexes catalyzed efficiently the Guerbet reaction of primary alcohols to β-alkylated dimer alcohols in good yields. For instance, the reaction of 1-butanol in the presence of [Cp*IrCl2]2 (1 mol %), t-BuOK (40 mol %), and 1,7-octadiene (10 mol %) produced 2-ethyl-1-hexanol in 93% yield. Various primary alcohols undergo the Guerbet reaction under the influence of Ir complexes to give the corresponding dimer alcohols in good yields. This method provides an alternative direct route to β-alkylated primary alcohols which are prepared by aldol condensation of aldehydes followed by hydrogenation.
- Matsu-Ura, Toyomi,Sakaguchi, Satoshi,Obora, Yasushi,Ishii, Yasutaka
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p. 8306 - 8308
(2007/10/03)
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