Chiral Anion Phase Transfer of Aryldiazonium Cations: An Enantioselective Synthesis of C3‐Diazenated Pyrroloindolines |
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Authors: | Dr Hosea M Nelson Solomon H Reisberg Hunter P Shunatona Jigar S Patel Prof?Dr F Dean Toste |
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Institution: | Department of Chemistry, University of California at Berkeley, Latimer Hall, Berkeley, CA (USA) |
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Abstract: | Herein is reported the first asymmetric utilization of aryldiazonium cations as a source of electrophilic nitrogen. This is achieved through a chiral anion phase‐transfer pyrroloindolinization reaction that forms C3‐diazenated pyrroloindolines from simple tryptamines and aryldiazonium tetrafluoroborates. The title compounds are obtained in up to 99 % yield and 96 % ee. The air‐ and water‐tolerant reaction allows electronic and steric diversity of the aryldiazonium electrophile and the tryptamine core. |
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Keywords: | amination asymmetric catalysis cyclization phase‐transfer catalysis photolysis |
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