New electrophilic reactions of 2,2′-bisindolyls with acid chlorides and carbodienophiles
作者:U. Pindur、Y.-S. Kim
DOI:10.1002/jhet.5570330317
日期:1996.5
Some new acylation and cyclization reactions of 2,2′-bisindolyls 1, 2 are described. The product patterns constitute acyl derivatives 3, 4, 5 and an aldehyde 7, indolo[2,3-a]carbazoles 6, 14, 17, 19, 20 and cyclopentadiindoles 22 and 24. In the reaction with aryne or diazotated anthranilic acid, a 3-benzoylindole derivative 9 and phenylindolyl azo dye 10 are formed. N-methylmaleimide reacts with 2