<?xml version='1.0' encoding='UTF-8'?>
<OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd">
  <responseDate>2026-03-14T08:32:40Z</responseDate>
  <request metadataPrefix="jpcoar_1.0" identifier="oai:kanazawa-u.repo.nii.ac.jp:00046853" verb="GetRecord">https://kanazawa-u.repo.nii.ac.jp/oai</request>
  <GetRecord>
    <record>
      <header>
        <identifier>oai:kanazawa-u.repo.nii.ac.jp:00046853</identifier>
        <datestamp>2024-07-01T06:49:40Z</datestamp>
        <setSpec>2812:2813:2843</setSpec>
      </header>
      <metadata>
        <jpcoar:jpcoar xmlns:datacite="https://schema.datacite.org/meta/kernel-4/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcndl="http://ndl.go.jp/dcndl/terms/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:jpcoar="https://github.com/JPCOAR/schema/blob/master/1.0/" xmlns:oaire="http://namespace.openaire.eu/schema/oaire/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:rioxxterms="http://www.rioxx.net/schema/v2.0/rioxxterms/" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns="https://github.com/JPCOAR/schema/blob/master/1.0/" xsi:schemaLocation="https://github.com/JPCOAR/schema/blob/master/1.0/jpcoar_scm.xsd">
          <dc:title>海洋動物由来の新規8ーオキソプリン類の合成</dc:title>
          <dc:title xml:lang="en">Syntheses of Novel 8-Oxopurines Derived from Sea Animals</dc:title>
          <jpcoar:creator>
            <jpcoar:nameIdentifier nameIdentifierURI="https://kaken.nii.ac.jp/ja/search/?qm=20019649" nameIdentifierScheme="e-Rad">20019649</jpcoar:nameIdentifier>
            <jpcoar:creatorName>藤井, 澄三</jpcoar:creatorName>
          </jpcoar:creator>
          <datacite:description descriptionType="Abstract">海綿の構成成分6ーiminoー1,9ーdimethylー8ーoxopurine (I)やイソギンチャクの構成成分caissarone(塩酸塩をIIで示す)は,天然プリン類としては珍しい8ーoxo構造を有しているので,これらの生物活性には興味が持たれる.これらの8ーオキソプリン類の化学合成は未検討であったので,本研究ではI及びIIを次のようにして合成し,それらの化学的性質を調べることができた.
1.9ーMethyladenine(III)を臭素化し,得られた8ーBr体(IV)をMeIでメチル化すると8ーlromoー1,9ーdimethyladesine(V)が得られた.Vを沸騰酢酸中NaOAcで処理すると,標的化合物IがIIIからの通算収率25%で得られた.別法では,IVを1NNaOH水溶液中で煮沸し,生成した9ーmethylー8ーoxoadenineをMelでメチル化したところ,IIIからの通算収率63%でIを合成することができた.
2.このようにして得たIは,1NNaOH水溶液中で煮沸すると,Dimroth転位を起してN___ー^6,9ーdimethylー8ーoxoadenine(VI)を与えた.Vも同様のDimroth転位を起すことが判明した.これらの転位の容易さを,1,9ーdimethyladenine(VII)を基準化合物に用いて反応速度論的に比較したところ,pH7.00ー11.42,40℃,イオン強度1.0ではV&gt;VII&gt;Iの順で転位が遅くなることが判明した.
3.VIをMel/AcNMe_2でメチル化したところ,3ーMe体・HI塩(VIII)(収率50%)及び1ーMe体・HI塩(13%)が得られた.次に,VIIIの水溶液をAmberlite IRAー402(Cl^-)カラムに通すことによって,他の標的化合物IIを98%の収率で得た.ここに得られたIIは,天然caissarone塩酸塩と同定することができた.この結果,IIIから6工程,通算収率28%によるIIの合成経路を確立することができた.</datacite:description>
          <datacite:description descriptionType="Abstract">1. The first total synthesis of 6-imino-1, 9-dimethy1-8-oxopurine (I), a constituent of the marine sponge Hymeniacidon sanguinea Grant, has been achieved via two alternative routes starting from 8-bromo-9-methyladenine (II), which is obtainable from 9-methyladenine (III) by bromination. The first route includes methylation of II with MeI to give 8-bromo-1, 9-di-methyladenine (IV) and treatment of IV with NaOAc in boiling AcOH to produce I in 25% overall yield (from III). The second route includes treatment of II with boiling 1 N aqueous NaOH and methylation of the resulting 8-oxo derivative with MeI, affording I in 63% overall yield (from III).
2.The reaction rates in the Dimroth rearrangements of the marine sponge base 6-imino-1, 9-dimethyl-8-oxopurine (I) and related compounds such as 1, 9-dimethyladenine (V) and 8-bromo-1, 9-dimethyladenine (IV) were measured in H_2O at various pH's and ionic strength 1.0 at 40^ﾟC. In all cases, attack of hydroxide ion on the protonated species of the substrate at the 2-position was faster than that on the neutral species by a factor of 100-1400. In the reaction of the protonated species, the relative ease of undergoing Dimroth rearrangement was in the order of IV &gt; V &gt; I. The same order of reactivity was found to hold for the neutral species.
3.The first chemical synthesis of caissarone hydrochloride, a constituent of the sea anemone Bunodosoma caissarum Correa 1964, has been accomplished via a two-step route including methylation of N6, 9-dimethyl-8-oxoadenine. This synthesis was based on a methylation study of N^6 -benzy1-9-methy1-8-oxoadenine.</datacite:description>
          <datacite:description descriptionType="Other">研究課題/領域番号:01571148, 研究期間(年度):1989-1990</datacite:description>
          <datacite:description descriptionType="Other">出典：「海洋動物由来の新規8ーオキソプリン類の合成」研究成果報告書　課題番号01571148
(KAKEN：科学研究費助成事業データベース（国立情報学研究所）)
　　　本文データは著者版報告書より作成</datacite:description>
          <dc:publisher>金沢大学薬学部</dc:publisher>
          <datacite:date dateType="Issued">1991-03</datacite:date>
          <dc:language>jpn</dc:language>
          <dc:type rdf:resource="http://purl.org/coar/resource_type/c_18ws">research report</dc:type>
          <oaire:version rdf:resource="http://purl.org/coar/version/c_ab4af688f83e57aa">AM</oaire:version>
          <jpcoar:identifier identifierType="DOI">https://doi.org/10.24517/00053180</jpcoar:identifier>
          <jpcoar:identifier identifierType="HDL">http://hdl.handle.net/2297/00053180</jpcoar:identifier>
          <jpcoar:identifier identifierType="URI">https://kanazawa-u.repo.nii.ac.jp/records/46853</jpcoar:identifier>
          <jpcoar:identifierRegistration identifierType="JaLC">10.24517/00053180</jpcoar:identifierRegistration>
          <jpcoar:relation>
            <jpcoar:relatedIdentifier identifierType="URI">https://kaken.nii.ac.jp/search/?qm=20019649</jpcoar:relatedIdentifier>
            <jpcoar:relatedTitle>https://kaken.nii.ac.jp/search/?qm=20019649</jpcoar:relatedTitle>
          </jpcoar:relation>
          <jpcoar:relation>
            <jpcoar:relatedIdentifier identifierType="URI">https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01571148/</jpcoar:relatedIdentifier>
            <jpcoar:relatedTitle>https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01571148/</jpcoar:relatedTitle>
          </jpcoar:relation>
          <jpcoar:relation>
            <jpcoar:relatedIdentifier identifierType="URI">https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-01571148/015711481990kenkyu_seika_hokoku_gaiyo/</jpcoar:relatedIdentifier>
            <jpcoar:relatedTitle>https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-01571148/015711481990kenkyu_seika_hokoku_gaiyo/</jpcoar:relatedTitle>
          </jpcoar:relation>
          <jpcoar:sourceTitle>平成2(1990)年度 科学研究費補助金 一般研究(C) 研究成果報告書</jpcoar:sourceTitle>
          <jpcoar:sourceTitle xml:lang="en">1990 Fiscal Year Final Research Report</jpcoar:sourceTitle>
          <jpcoar:volume>1989-1990</jpcoar:volume>
          <jpcoar:pageStart>5p.</jpcoar:pageStart>
          <jpcoar:file>
            <jpcoar:URI label="PH-PR-FUJII-T-kaken 1991-5p.pdf">https://kanazawa-u.repo.nii.ac.jp/record/46853/files/PH-PR-FUJII-T-kaken 1991-5p.pdf</jpcoar:URI>
            <jpcoar:mimeType>application/pdf</jpcoar:mimeType>
            <jpcoar:extent>81.8 kB</jpcoar:extent>
            <datacite:date dateType="Available">2019-02-14</datacite:date>
          </jpcoar:file>
        </jpcoar:jpcoar>
      </metadata>
    </record>
  </GetRecord>
</OAI-PMH>
