期刊
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
卷 2011, 期 24, 页码 4616-4622出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejoc.201100477
关键词
C-H activation; Cyclization; Fused-ring systems; Heck reaction; Palladium
资金
- Universite de Bordeaux
- Centre National de la Recherche Scientifique (CNRS)
- Agence Nationale de la Recherche (ANR) [JCJC 7141]
A fully palladium-catalyzed synthesis of unusual naphthoxindole alkaloids through a key intramolecular direct C-H arylation step leading to the formation of the phenanthrene core is described. The three-step process involves a highly efficient Heck coupling of aryl diazonium salts with phenyl-acrylates, giving the corresponding cis-stilbenes. Cyclization of stilbenes into phenanthrenes through a direct intramolecular C-H arylation, followed by a palladium-mediated cyclization of an amino ester, led to the formation of novel naphthoxindoles.
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