2007年
Bromoallenes as allyl dication equivalents in the presence or absence of palladium(0): Direct construction of bicyclic sulfamides containing five- to eight-membered rings by tandem cyclization of bromoallenes
CHEMISTRY-A EUROPEAN JOURNAL
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- ,
- ,
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- 巻
- 13
- 号
- 6
- 開始ページ
- 1692
- 終了ページ
- 1708
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1002/chem.200601373
- 出版者・発行元
- WILEY-V C H VERLAG GMBH
A highly regioselective synthesis of bicyclic sulfamides is described. Based on our recent discovery that bromoallenes can act as allyl dication equivalents in the presence of a palladium catalyst and alcohol, we investigated tandem cyclization of bromoallenes bearing a suffamide group. It is found that some bromoallenes act as allyl dication equivalents even in the absence of a palladium(0) catalyst to afford cyclosulfamides containing five-or six-membered rings. While the palladium-free cyclization is dependent on the substrate structure affording the bicyclic sulfamides through the first cyclization onto the proximal or central carbon atom of the bromoallenes, the palladium-catalyzed reaction strongly promotes the first cyclization onto the central allenic carbon atom to afford bicyclic sulfamides containing a seven-or eight-membered ring. Formation of two types of bicyclic sulfamides from single bromoallenes by simply changing the reaction conditions is also described.
- リンク情報
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- DOI
- https://doi.org/10.1002/chem.200601373
- J-GLOBAL
- https://jglobal.jst.go.jp/detail?JGLOBAL_ID=200902217416178993
- PubMed
- https://www.ncbi.nlm.nih.gov/pubmed/17200916
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000244577400004&DestApp=WOS_CPL
- ID情報
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- DOI : 10.1002/chem.200601373
- ISSN : 0947-6539
- J-Global ID : 200902217416178993
- PubMed ID : 17200916
- Web of Science ID : WOS:000244577400004