In this issue, T. D. Tilley et al. review the electrophilic activation of silicon–hydrogen bonds in catalytic hydrosilations. What are the relevant mechanisms? In a Minireview, J. Casado et al. discuss quinoidal/aromatic transformations in π-conjugated oligomers.

In the Communications section, G. A. Weiss et al. report on a ten-minute protein purification and surface tethering for continuous-flow biocatalysis (see picture). C. Copéret et al. describe reaction intermediates and the role of the metal–support interface on CO₂-to-methanol hydrogenation on zirconia-supported copper nanoparticles. S. Kitagawa et al. succeeded in the mechanical alloying of metal–organic frameworks and B. M. Trost et al. present an efficient access to chiral trisubstituted aziridines.

• Angewandte Chemie 9/2017: Efficient Access,
  Angew. Chem. Int. Ed. 2017, 56 (9).