1611476-81-3Relevant articles and documents
Multicomponent access to novel dihydroimidazo[1′,5′:1,2] pyrido[3,4-b]indol-2-ium salts and indoles by means of Ugi/Bischler-Napieralski/ heterocyclization two step strategy
Silvani, Alessandra,Lesma, Giordano,Crippa, Sergio,Vece, Vito
, p. 3994 - 4001 (2014/06/09)
A simple, efficient and general two step procedure, through a sequential Ugi reaction followed by a Bischler-Napieralski/heterocyclization tandem closure, to give novel 6,11-dihydro-5H-imidazo[1′,5′:1,2]pyrido[3,4- b]indol-2-ium salt derivatives, is described. By changing the amine and the acid components with ammonium formate, the same procedure affords 6,11-dihydro-5H-imidazo[1′,5′:1,2]pyrido[3,4-b]indole derivatives.