Document Detail


Enzymatic Acylation of Isoorientin and Isovitexin from Bamboo-Leaf Extracts with Fatty Acids and Antiradical Activity of the Acylated Derivatives.
MedLine Citation:
PMID:  23057589     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
ABSTRACT: This study enzymatically acrylates two flavonoids from bamboo-leaf extracts, isoorientin and isovitexin, with different fatty acids as acyl donors using Candida antarctica lipase B (CALB). The conversion yield ranged from 35% to 80% for fatty acids with different chain lengths. Higher isoorientin and isovitexin conversion yields (>75%) were obtained using lauric acid in tert-amyl-alcohol as the reaction medium. 1H NMR and 13C NMR spectroscopy analysis showed that in the presence of CALB, acylation occurred at the isoorientin and isovitexin primary hydroxyl group glucose moiety and only monoesters were detected. Introducing an acyl group into isoorientin and isovitexin significantly improved their lipophilicity but reduced their antiradical activity.
Authors:
Xiang Ma; Rian Yan; Shuqi Yu; Yuyun Lu; Zhuo Li; Haohao Lu
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-12
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  -     ISSN:  1520-5118     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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