Is 18α-Glycyrrhizin a real natural product? Improved preparation of 18α-Glycyrrhizin from 18β-Glycyrrhizin as a positive standard for HPLC analysis of licorice extracts
Is 18α-Glycyrrhizin a real natural product? Improved preparation of 18α-Glycyrrhizin from 18β-Glycyrrhizin as a positive standard for HPLC analysis of licorice extracts
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18α-甘草酸是真正的天然产物吗?从18β-甘草酸改进制备18α-甘草酸作为甘草提取物HPLC分析的阳性标准品?
DOI:
10.1007/s11418-021-01589-9
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发表时间:
2022
影响因子:
3.3
通讯作者:
Ishikawa Tsutomu
中科院分区:
文献类型:
--
作者:
Jitrangsri Kritamorn;Kamata Kazuaki;Akiba Mana;Yajiri Yoshie;Ishibashi Masami;Tatsuzaki Jin;Ishikawa Tsutomu
18α-Glycyrrhizin is an epimer of 18β-glycyrrhizin, a major component of licorice (Glycyrrhizasp.), which is widely used as a traditional medicine. Whether 18α-glycyrrhizin is a real natural product has been debated in the long history of glycyrrhizin chemistry because 18β-glycyrrhizin is epimerizable to a more thermodynamically stable 18α-glycyrrhizin under aqueous alkali conditions. We improved the preparation of 18α-glycyrrhizin from 18β-glycyrrhizin by successive epimerization reactions of 18β-glycyrrhizin, trimethyl esterification of the resulting epimerized mixture, and alkaline hydrolysis of a purified 18α-glycyrrhizin trimethyl ester. Approaches to the possible presence of 18α-glycyrrhizin in licorice extracts by HPLC using synthetic 18α-glycyrrhizin as a positive standard strongly suggested that 18α-glycyrrhizin could naturally exist as a minor congener of glycyrrhizin derivatives inGlycyrrhizaspecies.Graphical abstract
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影响因子:
3.3
作者:
Makino T
通讯作者:
Makino T
DOI:
--
发表时间:
1955
期刊:
影响因子:
--
作者:
J. Beaton;F. Spring
通讯作者:
F. Spring
DOI:
10.1039/jr9560002417
发表时间:
1956-01-01
期刊:
JOURNAL OF THE CHEMICAL SOCIETY
影响因子:
--
作者:
BEATON, JM;SPRING, FS
通讯作者:
SPRING, FS
DOI:
10.1080/02652039009373939
发表时间:
1990-11-01
影响因子:
2.9
作者:
SPINKS, EA;FENWICK, GR
通讯作者:
FENWICK, GR
影响因子:
0.9
作者:
L. Baltina;N. Serdyuk;O. B. Flekhter;L. V. Krasnova;V. A. Davydova;A. Ismagilova;F. Zarudii;G. Tolstikov
通讯作者:
G. Tolstikov