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Candida antarctica Lipase B-Catalyzed Acylation of Isoorientin and Isovitexin in Antioxidant of Bamboo Leaves (AOB)

MA Xiang,YAN Ri-an,LU Yu-yun   

  1. Department of Food Science and Engineering, Jinan University, Guangzhou 510632, China
  • Online:2013-08-25 Published:2013-09-03

Abstract:

The acylation catalyzed by Candida antarctica lipase B of isoorientin and isovitexin in antioxidant of bamboo
leaves (AOB) in tert-amyl alcohol as reaction medium was studied. The reaction condition was as follows: 50 g/L
lipase,100 g/L molecular sieve 4 Å, a molar ratio of flavonoids in AOB to laurate acid of 1:4, 60 ℃, 150 r/min stirring and
a reaction duration of 48 h. After being analyzed and separated by high-performance liquid chromatography, two types of
acylated flavonoids were obtained. Confirmation of chemical structures was performed by ESI-MS, 1H-NMR and 13C-NMR
and the two types of acylated flavonoids were isoorientin-6″-laurate and isovitexin-6″-laurate.

Key words: lipase, isoorientin, isovitexin, high performance liquid chromatography, acylation