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Syntheses of Novel 8-Oxopurines Derived from Sea Animals.

Research Project

Project/Area Number 01571148
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Chemical pharmacy
Research InstitutionKanazawa University

Principal Investigator

FUJII Tozo  Professor, Faculty of Pharmaceutical Sciences, Kanazawa University, 薬学部, 教授 (20019649)

Project Period (FY) 1989 – 1990
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1990: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1989: ¥1,100,000 (Direct Cost: ¥1,100,000)
KeywordsMarine sponge 8-oxoadenine / Sea anemone 8-oxoadenine / Aromatic nucleophilic substitution / Regioselective alkylation / 8-Substituted 1, 9-dimethyladenine / Dimroth rearrangement / Rate study / Acid dissociation constant / イソギンチャク / 8ーオキソアデニン / 位置選択的ベンジル化 / 位置選択的メチル化 / 水素化分解 / イオン交換 / 海綿8-オキソアデニン / 8-置換1,9-ジメチルアデニン
Research 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 > 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.

Report

(3 results)
  • 1990 Annual Research Report   Final Research Report Summary
  • 1989 Annual Research Report
  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] Tozo Fujii: "Purines.XLIII.A Total Synthesis of the Marine Sponge Base 6ーIminoー1,9ーdimethylー8ーoxopurine." Chem.Pharm.Bull. 38. 2146-2150 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tozo Fujii: "Purines.XLIV.A Kinetic Study of the Dimroth Rearrangeーment of the Marine Sponge Purine 1,9ーDimethylー8ーoxoadeーnine and Related Compounds." Chem.Pharm.Bull.38. 2591-2594 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tozo Fujii: "Synthesis of the Sea Anemone Purine Caissarone." <Tetrahedron>___ー <Lett>___ー.32. 97-100 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tozu Fujii, Tohru Saito, and Shigeji Mori: "Purines. XLIII. A Total Synthesis of the Marine Sponge Base 6-Imino-1, 9-dimethy1-8-oxopurine" Chem. Pharm. Bull.3 8 5. 2146-2150 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tozu Fujii, Tohru Saito, and Shigeji Mori: "Purines. XLIV. A Kinetic Study of the Dimroth Rearrangement of the Marine Sponge Purine 1, 9-Dimethy1-8-oxoadenine and Related Compounds" Chem. Pharm. Bull.3 8 5. 2591-2594 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tozo Fujii, Tohru Saito, Shigeji Mori, and Jun Chikazawa: "Synthesis of the Sea Anemone Purine caissarone" Tetrahedron Lett.3 2 5. 97-100 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tozo Fujii: "Purines.XLIII.A Total Synthesis of the Marine Sponge Base 6ーIminoー1,9ーdimethylー8ーoxopurine." Chem.Pharm.Bull.38. 2146-2150 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Tozo Fujii: "Purines.XLIV.A Kinetic Study of the Dimroth Rearrangement of the Marine Sponge Purine 1,9ーDimethylー8ーoxoadenine and Related Compounds." Chem.Pharm.Bull.38. 2591-2594 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Tozo Fujii: "Synthesis of the Sea Anemone Purine Caissarone." Tetrahedron Lett.32. 97-100 (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] Tozo Fujii: "Purines.XLIII.A Total Synthesis of the Marine Sponge Base 6-Imino-1,9-dimethyl-8-oxopurine." Chem. Pharm. Bull.

    • Related Report
      1989 Annual Research Report
  • [Publications] Tozo Fujii: "Purines.XLIV.A Kinetic Study of the Dimroth Rearrangement of the Marine Sponge Purine 1,9-Dimethyl-8-oxoadenine and Related Compounds." Chem.Pharm.Bull.

    • Related Report
      1989 Annual Research Report

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Published: 1989-04-01   Modified: 2016-04-21  

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