海薬の揮発成分に関する化学的研究-XIV : コンブLaminariaの揮発成分にについて(ソノ2)

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1. A fraction soluble in sodium hydrogen carbonate was submitted to silicagel column chromatography, with methanol as the stationary phase and iso-octane as the mobile phase under a pressure of nitrogen gas. The fatty acids present in each fraction were characterized as their p-bromphenacylesters. The presence of acetic, propionic, butyric, isovaleric, n-caproic, and caprylic acids was thus confirmed. 2. A carbonyl fraction was fractionated by a chromatoplate, followed by a treatment with 2.4-dinitrophenylhydrazine, the benzene extract of each hydrazone band was column-chromatographed. Besides 2.4-dinitrophenylhydrazones of benzaldehyde, nvaleraldehyde, and cis- and transforms of a 2.4-dinitrophenylhydrazone of furfural, reported in the preceding paper1), the 2.4-dinitrophenylhydrazone of α-methylfurfural was also found to occur in cis- and trans-forms which were confirmed by elemental analyses and infrared spectral measurements. 3. A terpene fraction was fractionated with a micro-fractionation apparatus and each was submitted to chromatostrip. From their Rf values, color tones, and pressure-boiling point curves, the presence of furfuryl alcohol, 1:8-cineol, linalool geraniol, and eugenol was revealed. Fraction of b.p.15 40-50°C contained a sulfur compound.
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