Organocatalytic stereoselective [8+2] and [6+4] cycloadditionsMose, Rasmus; Preegel, Gert; Larsen, Jesper; Jakobsen, Sofie; Iversen, Eva Hogh; Jorgensen, Karl AnkerNature chemistry2017 / p. 487-492 : ill http://dx.doi.org/10.1038/nchem.2682