title: Palladium-catalysed decarboxylative nitrile insertion via C-H activation or self-coupling of indole-2-carboxylic acids: a new route to indolocarbolines and triindoles.
abstract: Palladium catalysed-reaction of indole carboxylic acids with nitriles in the presence of Ag2CO3 proceeds via decarboxylative dual C-H activation leading to the nitrile insertion products, triazaindeno-fluorenes (indolocarbolines); in the absence of nitrile, diindolocarbazoles (heptacyclic triindoles or triazatruxenes) are formed.
authors.affiliation: School of Chemistry, University of Hyderabad, Hyderabad 500 046, Telangana, India. kckssc@uohyd.ac.in kckssc@yahoo.com.
authors.forename: R N
authors.initials: RN
authors.lastname: Prasad Tulichala
authors.forename: K C
authors.initials: KC
authors.lastname: Kumara Swamy