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Synfacts 2007(12): 1243-1243
DOI: 10.1055/s-2007-991399
DOI: 10.1055/s-2007-991399
Synthesis of Heterocycles
© Georg Thieme Verlag Stuttgart · New York
Zinc Triflate Catalyzed Synthesis of Condensed Maleimides and Carbazoles
Y. Li, H. Zou, J. Gong, J. Xiang, T. Luo, J. Quan, G. Wang*, Z. Yang*
Peking University, P. R. of China
Weitere Informationen
Publikationsverlauf
Publikationsdatum:
22. November 2007 (online)
![](https://www.thieme-connect.de/media/synfacts/200712/lookinside/thumbnails/10.1055-s-2007-991399-1.jpg)
Significance
Described here is a Zn(OTf)2-catalyzed cascade reaction of allenic esters with isonitrile that leads to substituted and condensed maleimides and carbazole derivatives. EDGs and EWGs on allenic esters are tolerated. The method was applied for the preparation of cycloalkylaryl-disubstituted maleimides E and of indole-fused maleimides H which upon aminolysis and photoinduced oxidative electrocyclization afford I, compounds of current pharmacological interest.