タンニン誘導體による脂肪の酸化防止に就て : (第2報)ブロトカテク酸の脂肪族アルコールエステルの效果及び没食子酸エステルとの比較

概要

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Six aliphatic alcohol esters of protocatechuic acid, shown in Table 1, were synthesized. Their protective effects on the oxidation of methyl oleate were tested and compared with those of gallic esters in gravimetric method at their various concentrations. Protocatechuic esters found, as were shown in Tables 2 and 3 and Fig. 1, to have an effect similar to hydroquinone at the concentration of 1/10, 000 Mol., but to be inferior in the effect to hydroquinone and gallic esters at the concentration of 1/50, 000 Mol. All the esters and hydroquinone, shown in Table 3, possessed no effect at the concentration of 1/250, 000 Mol.
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