Journal of the Korean Chemical Society (대한화학회지)

Korean Chemical Society (대한화학회)
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A Model Study toward the Synthesis of Xestoquinone

Xestoquinone의 합성에 대한 모델연구

  • Ahn Chan Mug (Department of Basic Science, Institute of Basic Medical Science, Yonsei University Wonju College of Medicine) ;
  • Ho Bum Woo (Department of Basic Science, Institute of Basic Medical Science, Yonsei University Wonju College of Medicine)
  • 안찬묵 (연세대학교 원주의과대학 기초과학교실) ;
  • 우호범 (연세대학교 원주의과대학 기초과학교실)
  • Published : 2003.08.20
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Abstract

A strategy for synthesis of the furan-fused tetracyclic system of xestoquinone was explored through a model study. Using 3-butyn-1-ol as a starting material, 5-iodo-1-methoxymethoxy pentyne (5) was prepared in 5 steps. Reaction of ethyl 2-phenylpropanoate with 5 gave ethyl 7-methoxymethoxy-2-methyl-2-phenyl-5-heptynoate (6) in 88% yield, and then methyl 9-oxo-4-methyl-4-phenyl-2,7-nonadiynoate (13), the key intermediate, was synthesized in 6 steps from the ester 6. Intramolecular cycloaddition reaction of 13 afforded isobenzofuran 14 in 5% yield, which was converted to the tetracyclic structure 15 in the presence of Lewis acid.

Xestoquinone의 퓨란-접합된 4환계화합물에 대한 합성전략을 모델연구를 통하여 조사하였다. 출발물질로서 3-butyn-1-ol을 이용하여, 5-iodo-1-methoxymethoxypentyne(5)이 5단계를 거쳐 제조되었다. Ethyl 2-phenylpropanoate와 5의 반응으로부터 ethyl 7-methoxymethoxy-2-methyl-2-phenyl-5-heptynoate(6)가 88%의 수득율로 얻어졌으며, 6으로부터 중요한 중간체인 methyl 9-oxo-4-methyl-4-phenyl-2,7-nonadiynoate(13)가 6단계를 거쳐 합성되었다. 13의 분자내 고리화반응은 5%의 수득율로 isobenzofuran 14을 생성하였으며, Lewis acid 존재 하에서 4환고리 구조로 전환되었다.

Keywords

References

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