Enantioselective Hydrogenation with Self-Assembling Rhodium Phosphane Catalysts: Influence of Ligand Structure and Solvent
作者:Mandy-Nicole Birkholz、Natalia V. Dubrovina、Haijun Jiao、Dirk Michalik、Jens Holz、Rocco Paciello、Bernhard Breit、Armin Börner
DOI:10.1002/chem.200601607
日期:2007.7.6
assemble by hydrogen bonding and form chelates. In contrast, synthetic precursors bearing alkoxypyridine appendages are not able to aggregate via intramolecular hydrogen bonds. The nature of self-assembly is dependent on the nature of the P ligand and the solvent used for the hydrogenation (CH2Cl2 vs. MeOH). These features affect the rate of the reaction as well as the enantioselectivity, which varied