2-Azanorbornyl Alcohols: Very Efficient Ligands for Ruthenium-Catalyzed Asymmetric Transfer Hydrogenation of Aromatic Ketones
作者:Diego A. Alonso、Sofia J. M. Nordin、Peter Roth、Tibor Tarnai、Pher G. Andersson、Marc Thommen、Ulrich Pittelkow
DOI:10.1021/jo991914a
日期:2000.5.1
2-Azanorbornyl-derived amino alcohols were prepared and evaluated as ligands in the Ru(II)-catalyzed asymmetric transfer hydrogenation of aromatic ketones. To improve selectivity and rate, the structure of the ligand was optimized. Acetophenone was reduced using 0.5 mol % catalyst in 40 min in 94% ee. This system was also able to reduce a wide range of aromatic ketones to the corresponding alcohols, while maintaining