Palladium catalyzed synthesis and physical properties of indolo[2,3-b]quinoxalines.

@article{Hung2014PalladiumCS,
  title={Palladium catalyzed synthesis and physical properties of indolo[2,3-b]quinoxalines.},
  author={T. Q. Hung and Do Huy Hoang and Ng{\^o} Ngọc Thắng and T. Dang and K. Ayub and A. Villinger and Aleksej Friedrich and S. Lochbrunner and G. Flechsig and P. Langer},
  journal={Organic & biomolecular chemistry},
  year={2014},
  volume={12 32},
  pages={
          6151-66
        }
}
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… Expand
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