1620194-51-5Relevant articles and documents
Palladium catalyzed synthesis and physical properties of indolo[2,3-b]quinoxalines
Hung, Tran Quang,Hoang, Do Huy,Thang, Ngo Ngoc,Dang, Tuan Thanh,Ayub, Khurshid,Villinger, Alexander,Friedrich, Aleksej,Lochbrunner, Stefan,Flechsig, Gerd-Uwe,Langer, Peter
, p. 6151 - 6166 (2014/08/05)
A series of indolo[2,3-b]quinoxaline derivatives were efficiently synthesized from 2,3-dibromoquinoxaline by two pathways. A one-pot approach using Pd-catalyzed two-fold C-N coupling and C-H activation reactions gave indolo[2,3-b]quinoxaline derivatives in good yields, but with limited substrate scope. In addition, a two-step approach to indolo[2,3-b]quinoxalines was developed which is based on Pd-catalyzed Suzuki coupling reactions and subsequent annulation by Pd-catalyzed two-fold C-N coupling with aromatic and aliphatic amines. The electrochemical and photochemical properties of indolo[2,3-b]quinoxaline derivatives were investigated. These studies show that 6-(4-methoxyphenyl)-6H-indolo[2,3-b]quinoxaline showed the highest HOMO energy level and lowest band gap. This journal is the Partner Organisations 2014.