Front Cover: Reductive Rearrangement of a 1‐Phospha‐2‐azanorbornene (Chem. Eur. J. 29/2021)

When fed the right food, the hermit crab depicted in the cover image grows bigger and finally needs a larger shell. This work reports the reactivity of a 1-phospha-2-azanorbornene, the product of a hetero Diels-Alder reaction between a 2H-phosphole and an activated imine. Thus, reductive cleavage of the phosphorus−nitrogen bond with LiAlH4 leads to an unprecedented ring expansion with formation of a 1-phosphabicyclo[3.2.1]octa-2,5-diene. The cover image was designed by Dr. Christoph Selg. More information can be found in the Full Paper by E. Hey-Hawkins et al. (DOI: 10.1002/chem.202100898).