期刊
TETRAHEDRON LETTERS
卷 50, 期 31, 页码 4423-4426出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2009.05.027
关键词
Nitroindoles; Aminoindoles; Reduction; Coupling; Cyclization
资金
- Ministerio de Educacion y Ciencia (MEC)
- FEDER [CTQ2007-61436/BQU]
- Junta de Castilla y Leon [BU021A09]
A one-pot selective synthesis of 2-substituted C5-, C6-, and C7-nitro- or amino-indoles has been developed from 2-halonitroanilines. These two types of nitrogen-substituted indoles have been selectively obtained by only varying the solvent used in the tandem Sonogashira coupling/heteroannulation reaction. Moreover, from commercially available 2-bromo-4,6-dinitroaniline an unprecedented in situ selective reduction of one of the nitro groups has allowed the synthesis of new 7-amino-5-nitro-2-substituted indoles. (C) 2009 Elsevier Ltd. All rights reserved.
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