Iridium??Catalyzed Hydrogenation of β??Dehydroamino Acid Derivatives Using Monodentate Phosphoramidites

S Enthaler, G Erre, K Junge, K Schröder…

Index: Enthaler, Stephan; Erre, Giulia; Junge, Kathrin; Schroeder, Kristin; Addis, Daniele; Michalik, Dirk; Hapke, Marko; Redkin, Dmitry; Beller, Matthias European Journal of Organic Chemistry, 2008 , # 19 p. 3352 - 3362

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Citation Number: 19

Abstract

Abstract The iridium-catalyzed asymmetric hydrogenation of 13 different β-dehydroamino acid derivatives to give optically active β-amino acid esters has been examined. Readily accessible monodentate octahydrobinaphthol-based phosphoramidites were used as chiral ligands. Good to excellent enantioselectivities and yields were obtained for the E isomers, whereas poorer catalyst performance was found for the Z isomers. Importantly, to obtain ...