Journal
TETRAHEDRON LETTERS
Volume 52, Issue 36, Pages 4665-4670Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2011.07.008
Keywords
Indolequinones; Sonogashira coupling; Cascade reaction; Copper; Palladium
Categories
Funding
- Taheebo Japan Co., Ltd.
- SANSHIN METAL WORKING Co., Ltd.
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A mild strategy for constructing indolequinone motifs is described on the basis of the Sonogashira reaction and a copper-catalyzed intramolecular cyclization cascade reaction. The first step involves the palladium- and copper-catalyzed reaction between halogenated naphthoquinone and terminal acetylene to generate a coupling product, which then reacts in a copper-catalyzed intramolecular cyclization with the nitrogen functional group adjacent to the carbon-carbon triple bond. (C) 2011 Elsevier Ltd. All rights reserved.
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