Journal
TETRAHEDRON
Volume 61, Issue 15, Pages 3637-3649Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2005.02.033
Keywords
palladium-catalyzed; indoles; reductive; annulation
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A route to 3,4-fused indoles via two consecutive palladium-catalyzed reactions; an intramolecular Heck reaction followed by a reductive N-heteroannulation is described. Using this route, a number of indoles have been prepared having a variety of ring sizes anchored to the 3- and 4-position of the indole nucleus. Furthermore, a number of functional groups, both carbon and heteroatom substituents can be introduced in (and on) the additional ring without any detrimental effects on the two reactions. (c) 2005 Elsevier Ltd. All rights reserved.
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