• Title/Summary/Keyword: 6-(1-acyloxyalkyl)-5,8-dialkoxy-1,4-naphthoquinones

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6-(1-Hydroxy or Acyloxyalkyl)-5,8-Dialkoxy-1,4-Naphthoquinones: Synthesis, Evaluation of Cytotoxic Activity; Antitumor Activity and Inhibitory effect on DNA Topoisomerase-I (6-(1-하이드록시 또는 아실옥시알킬)-5,8-디알콕시-1,4-나프토퀴논 유도체의 합성, DNA Topoisomerase-I에 대한 억제, 세포독성 및 항암활성)

  • Kim, Yong;Choi, Su-La;Myung, Pyung-Keun;Ahn, Byung-Zun
    • YAKHAK HOEJI
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    • v.44 no.2
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    • pp.141-148
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    • 2000

  • A new synthetic method of 6-(1-oxyalkyl)-5,8-dimethoxy-1,4-naphthoquinones was developed, 2-formyl-1,4,5,8-tetramethoxynaphthalene was oxidized to form 6-formyl-5,8-dimethoxy-1,4-naphthoquinone(DMNQ). This was selectively reduced and benzylated to produce 6-formyl-5,8-dimethoxy-1,4-dibenzyloxynaphthalene, to which various alkylmagnesium halide were added, followed by debenzylation and oxidation in sequence, yielding 6-(1-hydroxyalkyl)-DMNQ derivatives. 6-(1-hydroxyalkyl)-5,8-diethoxy-1,4-naphthalene (DENQ) derivatives were synthesized by similar procedure. 1'-OH of the naphthoquinone derivatives was acylated with various alkanoic acids to give 6-(1-acyloxyalkyl)-DMNQ or DENQ derivatives. TOPO-I inhibitory activity and cytotoxicity of DENQs were less potent than that of DMNQs. Among the DMNQ and DENQ analogues, the ones with alkyl group being heptyl were most potent in TOPO-I inhibition $IC_{50}$/; 30.1, 36.4 $\mu$M). DUNQ derivatives with a longer side chain exhibited a weaker cytotoxicity. A correlation between size of the alkyl side chain and cytotoxicity was not observed for DENQ derivatives. Acylation of 1'-hydroxyl group, in general, decreased both TOPO-I inhibitory activity and cytotoxicity T/C (%) values of the DENQ derivatives on S-180 intraperitoneal tumor were larger than those of DMNQ derivatives. Among the compounds synthesized,6-(1-hydroxyheptyl)-DENQ and 6-(1-hex-anoyloxyoctyl)-DMNQ showed the highest T/C values of 183% and 182%, respectively.

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