| Project/Area Number |
16390003
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Chemical pharmacy
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| Research Institution | Chiba University |
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Principal Investigator |
NISHIDA Atsushi Chiba University, Graduate School of Pharmaceutical Sciences, Professor, 大学院・薬学研究院, 教授 (80130029)
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| Project Period (FY) |
2004 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥13,000,000 (Direct Cost: ¥13,000,000)
Fiscal Year 2006: ¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2005: ¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2004: ¥5,800,000 (Direct Cost: ¥5,800,000)
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| Keywords | lapidilectam / alkaloid / isomerization / cycloisomerization / indoline / ruthenium complex / fistulosin / manzamine A / 相関移動触媒 / ピロリドン / ジアゾエステル / 異性化反応 / 環化異性化反応 / Grubbs触媒 / インドール / ルテニウム錯体 / ナカドマリンA / 閉環メタセシス / Diels-Alder反応 / フラン / ルテニウム / カルベン錯体 |
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| Research Abstract |
1.A new isomerization and cycloisomerization catalyst was developed by the reaction of Grubbs ruthenium carbine catalyst and trimethylsilyloxyvinylether. Using the catalyst, we developed a new method for the synthesis of indoles and 3-methyleneindolines. As an application of this reaction, we have succeeded in the synthesis of the putative structure of fistulosin which was isolated from the root or the Welsh onion and reported to have antifungal activity. Starting from 2-aminostylene, we have prepared the compounds and characterized by spectral means. However, the spectral data was not agree with those reported for fistulosin.
2.We have studied a total synthesis of Kopsia alkaloid lapidilectam and lundrine B. Although the biological activity of lapidilectam has not been reported, lundrine B has strong activity of anti-cancer activity. Based on the strategy developed by our group, central core was synthesized using Heck type cyclization with isomerization of olefin. Further study will be continued for the total synthesis.
3.Furan-iminium cation cyclization was developed. An application of this reaction has already been reported in the first total synthesis of nakadomarin A, a marine alkaloid isolated from sponge collected at Okinawa. Further study has been continued to clarify the scope and limitation of this reaction and we found that the reaction could be applied for other substrate. A new synthetic method for ircinal A, a biogenetical and synthetic intermediate for manzamine A, has been developed.
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