Ru(η1-BH4)(daipena)(diphosphine): Ruthenabicyclic borohydride complexes for asymmetric hydrogenation of ketones and asymmetric formal hydroamination of allylic alcohols under base-free conditions
notable stability under air were developed. These novel Ru complexes were efficientcatalyst precursors for asymmetric hydrogenation of simple ketones under base-free conditions or with a small amount of DABCO to afford the corresponding alcohols with high enantioselectivity (>99 % ee in the best cases). Asymmetric formal hydroamination of allylicalcohols without an addition of base, via a borrowing hydrogenation
开发了带有 η 1 -BH 4配体并在空气中表现出显着稳定性的钌双环配合物。这些新型Ru配合物是有效的催化剂前体,用于在无碱条件下或使用少量DABCO对简单酮进行不对称氢化,以提供具有高对映选择性的相应醇(在最好的情况下> 99 % ee)。通过借用氢化策略,在不添加碱的情况下也实现了烯丙醇的不对称形式氢胺化。多种烯丙醇和胺适用于该反应(最好的情况下 >99% ee)。