Microbial Oxidation of Tetradecanols and Related Substances in Organic Solvents

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Microbial oxidations of n-tetradecane, tetradecanols and tetradecanoic acid were investigated by using intact cells of Corynebacterium equi, a hydrocarbon-assimilating bacterium, in an aqueous phase and organic solvents. The bacterial cells were hydrophobic and could be well dispersed in all organic solvents employed to give homogeneous reaction mixtures, and among them, isooctane was found to be the best for the reaction. n-Tetradecane and tetradecanoic acid were completely oxidized in the aqueous phase, but not in isooctane. In contrast, 1-tetradecanol was oxidized much more readily in isooctane than in the aqueous phase, and an oxidation product identified as myristyl myristate was accumulated in isooctane at the conversion rate of 80%. 2-Tetradecanol was also readily oxidized in isooctane, and 2-tetradecanone was obtained at the conversion rate of nearly 100%.Similar results were obtained when toluene and n-hexane were used as the solvent in place of isooctane, while no reaction was observed when chloroform was employed.
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