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Isolation and Purification of Berberine in Cortex Phellodendri by Centrifugal Partition Chromatography

Centrifugal Partition Chromatography에 의한 황백으로부터 Berberine의 분리 및 정제

  • 김중배 (상지영서대학교 식품영양조리과) ;
  • 방병호 (을지대학교 식품영양학과)
  • Received : 2014.04.25
  • Accepted : 2014.06.17
  • Published : 2014.06.30

Abstract

Cortex Phellodendri (CP) is derived from the dried bark of Phellodendron amurense. It has been widely used as a drug in traditional Korea medicine for treating diarrhea, jaundice, swelling pains in the knees and feet, urinary tract infections, and infections of the body surface. Many analytical methods have been used to study oriental herbal medicines, such as thin-layer chromatography, column liquid chromatography, and high performance liquid chromatography (HPLC). In this study, preparative centrifugal partition chromatography (CPC) was successfully carried out in order to separate pure compounds from a CP methanol extract. The optimum two-phase CPC solvent system was composed of n-butanol: acetic acid: water (4:1:5 v/v/v). The flow rate of the mobile phase was 3 mL/min in ascending mode with rotation at 1,000 rpm. The CPC-separated fraction and purification procedures were carried out by preparatory HPLC. The $^1H$ NMR spectrum revealed that the resonances at ${\delta}$ 4.10 and 4.20 ppm corresponded to three protons ($-OCH_3$), whereas those at ${\delta}$ 6.10 ppm corresponded to two protons ($-OCH_2O-$). Further, two aromatic protons (H-11 and H-12) conveys a doublet-doublet pattern. The H-11 doublet and H-12 doublet appear at ${\delta}$ 7.98 and 8.11, respectively. The $^{13}C$ NMR. spectrum showed a tetrasubstituted with a methylenedioxy group at C2 and C3, and two methoxy groups at C9 and C10. The chemical structure of the berberine was identified by $^1H$, $^{13}C$-nuclear magnetic resonance and electrospray ionization-mass spectroscopy spectral data analysis.

황백(Cortex Phellodendri: CP)은 황벽나무(Phellodendron amurense)의 건조된 수피로부터 얻어진다. 이 수피는 한국의 전통 한약제로서 설사, 황달, 무릎과 발의 통증, 요도관 및 피부 감염증에 폭넓게 사용되어 왔다. 이들 기능성 성분의 분리 및 정제는 박층 크로마토크래피, 컬럼 액체 크로마토크래피 및 HPLC와 같은 여러 분석법들이 동양의 약초연구에 이용되어 왔다. 본 연구는 CP로부터 berberine을 분리하기 위해 향류분배 크로마토크래피법(CPC)으로 효과적으로 수행하였다. 두 용매의 CPC 최적조성은 n-butanol: acetic acid: water(4:1:5 v/v/v)이었다. 이동상의 유속은 1,000 rpm 회전력에서 상승법으로 분당 3 mL 속도로 전개시켰다. CPC에서 분리된 분획분은 prep-HPLC로 정제하였다. $^1H$-NMR 스펙트럼은 4.10과 4.20 ppm에서 $3H(-OCH_3)$, 6.10 ppm에서 2H의 ($-OCH_2O-$) proton signal의 공명이 관찰되었다. 2개의 방향족 proton은 이중결합 패턴을 보였다. H-11과 H-12 doublet은 각각 7.98과 8.11에서 나타났다. $^{13}C$-NMR 스펙트럼에서는 C2와 C3의 methylenedioxy group($-OCH_2O-$), C9과 C10에 methoxy group($-OCH_3$)이 4개의 치환된 형태로 보였다. 분리 정제된 berberine의 화학구조는 $^1H$, $^{13}C$-NMR, ESI-MS 데이터 분석으로 확인하였다.

Keywords

References

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