Bering, L., Paulussen, F. M., & Antonchick, A. P. (2018). Aerobic, Metal-Free, and Catalytic Dehydrogenative Coupling of Heterocycles: En Route to Hedgehog Signaling Pathway Inhibitors. Organic Letters, 20(7), 1978-1981. doi:10.1021/acs.orglett.8b00521.