A.  Nandakumar, Midya, S. Prasad, Landge, V. Gokulkrish, and Balaraman, E., ?Transition-metal-catalyzed hydrogen-transfer annulations: access to heterocyclic scaffolds?, Angewandte Chemie-International Edition, vol. 54, no. 38, pp. 11022-11034, 2015.