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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).\n2.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\u0027s and ionic strength 1.0 at 40^゚C. 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海洋動物由来の新規8ーオキソプリン類の合成
https://doi.org/10.24517/00053180
https://doi.org/10.24517/000531806b0f3d51-5147-4800-b5c9-af28921263e0
名前 / ファイル | ライセンス | アクション |
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PH-PR-FUJII-T-kaken 1991-5p.pdf (81.8 kB)
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Item type | 報告書 / Research Paper(1) | |||||
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公開日 | 2019-02-14 | |||||
タイトル | ||||||
タイトル | 海洋動物由来の新規8ーオキソプリン類の合成 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Syntheses of Novel 8-Oxopurines Derived from Sea Animals | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_18ws | |||||
資源タイプ | research report | |||||
ID登録 | ||||||
ID登録 | 10.24517/00053180 | |||||
ID登録タイプ | JaLC | |||||
著者別表示 |
Fujii, Tozo
× Fujii, Tozo |
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書誌情報 |
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 en : 1990 Fiscal Year Final Research Report 巻 1989-1990, p. 5p., 発行日 1991-03 |
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出版者 | ||||||
出版者 | 金沢大学薬学部 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | 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>VII>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. |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | 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 > V > 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. |
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内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 研究課題/領域番号:01571148, 研究期間(年度):1989-1990 | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 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 |
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著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
関連URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://kaken.nii.ac.jp/search/?qm=20019649 | |||||
関連名称 | https://kaken.nii.ac.jp/search/?qm=20019649 | |||||
関連URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01571148/ | |||||
関連名称 | https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01571148/ | |||||
関連URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-01571148/015711481990kenkyu_seika_hokoku_gaiyo/ | |||||
関連名称 | https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-01571148/015711481990kenkyu_seika_hokoku_gaiyo/ |