A facile approach to spirocyclic 2-azido indolines via azidation of indoles with ceric ammonium nitrate.

@article{Li2014AFA,
  title={A facile approach to spirocyclic 2-azido indolines via azidation of indoles with ceric ammonium nitrate.},
  author={Jing Li and Mao Sen Liu and Qi Cheng Li and Hua Tian and Yian Shi},
  journal={Organic & biomolecular chemistry},
  year={2014},
  volume={12 48},
  pages={9769-72}
}
This paper describes azidation of indoles with NaN3 and ceric ammonium nitrate (CAN), giving a variety of spirocyclic 2-azido indolines in good yields and moderate diastereoselectivities.