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Enzymatic transformation of platycosides and one‐step separation of platycodin D by high‐speed countercurrent chromatography
Author(s) -
Ha In Jin,
Ha Young Wan,
Kang Minseok,
Lee Jongsung,
Park Deokhoon,
Kim Yeong Shik
Publication year - 2010
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.200900842
Subject(s) - chemistry , countercurrent chromatography , chromatography , triterpene , ethyl acetate , saponin , glycoside , sapogenin , butanol , stereochemistry , column chromatography , organic chemistry , ethanol , medicine , alternative medicine , pathology
Platycosides, the saponins found in the roots of Platycodon grandiflorum (Platycodi Radix), are typically composed of oleanane triterpenes with two side chains. In platycosides, platycodin D, a glucose unit at C‐3, is a major component, which has several pharmacological activities. Because of the high demand for this compound, we attempted to enzymatically convert platycodin D 3 and platycoside E, having two and three glucose units at C‐3, respectively, into platycodin D. In this study, we tested the ability of several glycosidases to transform platycosides, or more specifically, the ability to transform platycoside E and platycodin D 3 into platycodin D. To obtain pure platycodin D on a preparative scale, high‐speed countercurrent chromatography with a solvent system of ethyl acetate/ n ‐butanol/water (1.2:1:2, v/v/v) was used for the separation of the enzymatically transformed product. Approximately 39.4 mg of platycodin D (99.8% purity) was obtained from 200 mg of the product in a one‐step separation. The results strongly support the advantage of enzymatic transformation of the platycosides for the efficient enrichment of platycodin D in the complicated extract of the medicinal plant.