Title: Synthesis of Liposoluble Tea Polyphenols with Varying Aliphatic Groups and Their Antioxidation Activity
Abstract: Liposoluble tea polyphenols (LTP) with varying aliphatic groups were synthesized by reaction of aliphatic acyl chloride and tea polyphenol (TP).Solubility of the products in salad oil increased more than 2000 times when aliphatic acyl chlorides having 10 or more carbon atoms were used.IR absorption spectra indicated that the relative percentage contents of phenolic hydroxyl in LTPs were reduced to 68 4%-80 7% compared with that of TP (104%). But LTPs still remained antioxidation activity in salad oil,effect of which depended on the length of aliphatic chain. It was found that the products obtained from decanoyl chloride and lauroyl chloride (recorded as LTP-10 and LTP-12, respectively) exhibited perfect antioxidant effect in salad oil . For example, at the concentration of 600mg/kg on the basis of TP content,peroxide-inhibiting rate of LTP-10 on salad oil incubated at 60 ℃ for 15 days and at room temperature for 120 days were 71 5% and 48 7% respectively,higher than that of TP( 62 4% and 32 0% respectively).
Publication Year: 2002
Publication Date: 2002-01-01
Language: en
Type: article
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