Gold-Facilitated ‘6-Exo-dig’ Intramolecular Cyclization of 2-[(2-Nitrophenyl)ethynyl]phenylacetic Acids: General Access to 5H-Benzo[b]carbazole-6,11-diones
2009; Thieme Medical Publishers (Germany); Volume: 2009; Issue: 19 Linguagem: Inglês
10.1055/s-0029-1218362
ISSN1437-2096
AutoresRamón J. Estévez, Cristian O. Salas, Francisco J. Reboredo, Juan C. Estévez, Ricardo A. Tapia,
Tópico(s)Plant and Fungal Species Descriptions
ResumoThe preliminary results of a regiospecific synthesis of (Z)-1-(2-nitrobenzylidene)isochroman-3-ones by gold(I)-catalyzed cycloisomerization of phenylethynylacetic acids under mild conditions is described. These novel lactones proved to be suitable starting materials for a new, general access to 5H-benzo[b]carbazole-6,11-diones.
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