The most favorable dopants for solid‐state hydrogen‐storage materials are still considered to be compounds of titanium in spite of intensive research on other catalysts. Here, we show that NaAlH4 doped with ScCl3 is a highly efficient dopant, both with respect to storage capacity and kinetics: 2 mol % ScCl3 exhibits a nearly theoretical hydrogen‐storage capacity (4.9 wt %, see graph). Other rare‐earth metal trichlorides are also investigated.

Up to four stereocenters can be created efficiently in a single step by the asymmetric hydrogenation of oxazolidinone‐substituted pyridines (see scheme). Furthermore, selective chirality transfer and nondestructive cleavage of the chiral auxiliary occur under the same reaction conditions, making an additional cleavage step unnecessary.

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Sorption G 6000Advanced Hydrogen-Storage Materials Based on Sc-, Ce-, and Pr-Doped NaAlH 4 .-LnCl3 (Ln: Sc, Ce, Pr) doped NaAlH4 are efficient solid state hydrogen storage materials. This applies especially to storage capacity (Sc) and to cycling stability (Ce, Pr). NaAlH4 ball-milled with 2 mol% ScCl3 exhibits a nearly theoretical hydrogen storage capacity of 4.5-4.9 wt%, which persists throughout a test of seven cycles. In comparison to TiCl 3 -doped NaAlH 4 , ScCl 3 and CeCl 3 dopants reduce hydrogenation times roughly by a factor of two at high pressure and by a factor of ten at low pressure. -(BOGDANOVIC*, B.; FELDERHOFF, M.; POMMERIN, A.; SCHUETH, F.; SPIELKAMP, N.; Adv.