Cover Picture: CuH in a Bottle: A Convenient Reagent for Asymmetric Hydrosilylations (Angew. Chem. Int. Ed. 39/2005)



The innate stability of the extraordinarily reactive and enantioselective reagent [{(R)-(−)-DTBM-segphos}CuH] (whose structure is shown in the cover picture) is revealed in the Communication by Lipshutz and Frieman on page 6345 ff. Although there have been many advances in ligand-accelerated catalysis of hydrosilylations, these reactions invariably require the preparation of the catalyst prior to use owing to their limited shelf-life. This new reagent represents the first asymmetric “CuH in a Bottle”.