Efficient Synthesis of Maleimides and Carbazoles via Zn(OTf)2-Catalyzed Tandem Annulations of Isonitriles and Allenic Esters
Organic Letters2007Vol. 9(20), pp. 4057–4060
Citations Over TimeTop 11% of 2007 papers
Yuanzhen Li, Haixia Zou, Jianxian Gong, Jing Xiang, Tuoping Luo, Junmin Quan, Guoxin Wang, Zhen Yang
Abstract
Lewis acid Zn(OTf)(2)-catalyzed tandem annulations of isonitriles and allenic esters which lead to efficient and flexible syntheses of a range of biologically significant maleimides and carbazoles and related compounds are reported. A mechanistic rationale is proposed to account for the observed reactivity.
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