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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2003, Vol. 4 Issue (6): 714-718    DOI: 10.1631/jzus.2003.0714
Materials & Biotechnology     
A novel long-chain acyl-derivative of epigallocatechin-3-O-gallate prepared and purified from green tea polyphenols
CHEN Ping, TAN Yao, SUN Dong, ZHENG Xiao-ming
Catalysis Institute, Zhejiang University, Hangzhou 310028, China; Medical College of Wenzhou, Wenzhou 325000, China
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Abstract  Lipophilic tea polyphenols (LTP) were prepared by catalytic esterifica tion of green tea polyphenols (GTP) with hexadecanoyl chloride. A novel long-ch a in acyl-derivative of epigallocatechin-3-o-gallate (EGCG) was first isol ated fro m purification of LTP by high-speed countercurrent chromatography (HSCCC) using a solvent system composed of n-hexane-ethyl acetate-methanol-water (1:1:1:1, v/v). The molecular structure of the acyl-derivative, Epigallocatechin-3-O- gall ate-4\'-O-hexadecanate, was elucidated by means of elemental analysis, I R, 1H-NMR and MS spectra.

Key words： Green tea polyphenols      Lipophilic tea polyphenols      Epi gallocatechin-3-O-gallate      Epigallocatechin-3-O-gallate-4\'-O-hexadecanate      Isolation      High-speed countercurrent chromatography     
Received: 02 November 2002     
CLC:  O69  
  S571.1  
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CHEN Ping
TAN Yao
SUN Dong
ZHENG Xiao-ming
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CHEN Ping, TAN Yao, SUN Dong, ZHENG Xiao-ming. A novel long-chain acyl-derivative of epigallocatechin-3-O-gallate prepared and purified from green tea polyphenols. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2003, 4(6): 714-718.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2003.0714     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2003/V4/I6/714

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