せんだん成分の研究 (第1報)
果実油について
1951 年 71 巻 12 号 p. 1463-1466
詳細
1951 年 71 巻 12 号 p. 1463-1466
1) From the ether extract of the fruits of Neem tree (Melia azedarach L. var. japonica Makino) five neutral oil fractions were obtained by chromatographic adsorption. Their saponification values were 188.22-209.22, and iodine values, 135.82-146.93.
2) The adsorbability of the oil was found to be dependent on the number of double bonds rather than on the molecular weight.
3) By the estimation of Reichert-Meiszl and Polenske values of the total neutral oil, 6.67% of the consituent fatty acids was found to be volatile.
4) The volatile fatty acids were led to hydroxamic acids and paper-chromatographed by which acetic and caproic acids were obtained which were also confirmed as silver salts and p-bromophenacyl esters.
5) In case hydrated butanol was used as a solvent at 24-25°, the Rf value of valerohydroxamic acid was slightly smaller than that of isovalerohydroxamic acid, the reverse of which was true in the case of using hydrated ethyl acetate as a solvent.
