Das, S., Liu, L., Zheng, Y., Alachraf, M. W., Thiel, W., De, C. K., et al. (2016). Nitrated Confined Imidodiphosphates Enable a Catalytic Asymmetric Oxa-Pictet–Spengler Reaction. Journal of the American Chemical Society, 138(30), 9429-9432. doi:10.1021/jacs.6b06626.