Journal of the Korean Chemical Society (대한화학회지)

Korean Chemical Society (대한화학회)
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The Structure of Phenolic Compounds and Their Antibiotic Activities in Umbilicaria vellea

Umbilicaria vellea 중 페놀성 화합물의 구조 및 항균활성

  • 민태진 (동국대학교 이과대학 화학과) ;
  • 배강규 (동국대학교 이과대학 화학과)
  • Published : 19960900
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Abstract

In order to identify antibiotic substances in the extract of a lichen, Umbilicaria vellea, the extract was chromatographed and two compounds were isolated. Compound I which showed antifungal and antibacterial activities, melted around 129∼132$^{\circ}C$ and showed UV absorption at 217, 265 and 300 nm. It showed a molecular ion at m/z 196. Its molecular formular was confirmed to be $C_{10}H_{12}O_4$ from elemental analysis. From its IR and NMR data it was identified to be ethyl 2,4-dihydroxy-6-methyl benzoate. Compound II melted around 58∼59$^{\circ}C$ and showed UV absorption at 212, 276 and 282 nm. It showed a molecular ion at m/z 124 and molecular formular was confirmed to be $C_7H_8O_2.$ From the analysis of its IR and NMR spectra it was identified to be 5-methyl-1,3-benzenediol.

지의류에 속하는 Umbiliciaria vellea 중 에탄올 분획의 항균활성 물질을 규명하기 위하여 silica겔 컬럼 크로마토그래피 및 재결정법으로 화합물 I과 II를 순수히 분리정제하여 그 구조와 항균활성을 측정하였다. 정제된 화합물I은 Cryptococcus neoformance 등의 균에 대한 항진균활성과, Pseudomonas aeruginosa등의 균에 대한 항세균 활성이 있었다. 이 물질의 녹는점은 129~132$^{\circ}C$였고, 217, 265 및 330 nm의 UV 최대흡광을 보였다. 그리고 EI-mass에서 측정된 분자이온은 m/z 196이었고, 원소분석 결과 분자식은 $C_{10}H_{12}O_4$였으며 IR 및 NMR 스펙트라로부터 이 물질이 ethyl 2,4-dihydroxy-6-methyl benzoate임을 확인하였다. 화합물 II의 녹는점은 58~59$^{\circ}C$였고, 212, 276 및 282 nm의 UV 최대흡광을 보였다. 이 물질의 분자이온은 m/z 124였고, $C_7H_8O_2$의 분자식을 갖는 5-methyl-1,3-benzenediol임을 확인하였다.

Keywords

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