Gold-Catalyzed Intramolecular Reaction of Indoles with Alkynes: Facile Formation of Eight-Membered Rings and an Unexpected Allenylation
作者:Catalina Ferrer、Antonio M. Echavarren
DOI:10.1002/anie.200503484
日期:2006.2.6
Intra- and Intermolecular Reactions of Indoles with Alkynes Catalyzed by Gold
作者:Catalina Ferrer、Catelijne H. M. Amijs、Antonio M. Echavarren
DOI:10.1002/chem.200601324
日期:2007.2.2
Indoles react intramolecularly with alkynes in the presence of gold catalysts to give fromsix- to eight-membered-ring annulated compounds. The cationic Au(I) complex [Au(PC(6)H(4)(o-Ph)}(tBu)(2))(NCMe)]SbF(6) is the best catalyst for the formation of six- and seven-membered rings by 6-endo-dig, 6-exo-dig, and 7-exo-dig cyclizations. Indoloazocines are selectively obtained with AuCl(3) as catalyst