An asymmetric hydrogenation of 3-benzoylaminocoumarins was achieved for the first time using our BridgePhos-Rh catalytic system, providing chiral 3-amino dihydrocoumarins in high yields (up to 98 %) and with excellent enantioselectivities (up to 99.7 % ee). The relationship between the enantioselectivities of the hydrogenations and the dihedral angles and the resulting π-π stacking effects of the BridgePhos-Rh complexes, which were determined by X-ray diffraction analysis, are discussed. The corresponding hydrogenated products allow for many transformations, providing several chiral skeletons with important physiological and pharmacological activities.

中文翻译：

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3-苯甲酰氨基香豆素的铑催化不对称氢化合成手性3-氨基二氢香豆素

使用我们的 BridgePhos-Rh 催化系统首次实现了 3-苯甲酰氨基香豆素的不对称氢化，以高产率（高达 98%）和优异的对映选择性（高达 99.7% ee）提供手性 3-氨基二氢香豆素。讨论了氢化的对映选择性和二面角之间的关系以及由此产生的 BridgePhos-Rh 配合物的 π-π 堆叠效应，这些关系是通过 X 射线衍射分析确定的。相应的氢化产物可以进行多种转化，从而提供多种具有重要生理和药理活性的手性骨架。