Homogeneous asymmetric hydrogenation using phosphine ligands of transition metals
申请人:Chirotech Technology, Inc.
公开号:US06207853B1
公开(公告)日:2001-03-27
A process for the preparation of an enantiomerically enriched 2-substituted succinic acid derivative of formula 2, which comprises asymmetric hydrogenation of the dehydro precursor of formula 7 or 8, or a mixture thereof
wherein R1 and R2 are independently H, a salt-forming cation, or an organic group of up to 30 C atoms, and R3 and R4 are independently H or an organic group of up to 30 C atoms, provided that R3 and R4 are not both H, in the presence of a transition metal complex of a chiral phosphine ligand having the partial formula 10
wherein n is 0 to 6 and R represents at least one non-hydrogen organic group of up to 30 C atoms.
一种制备手性富集的2-取代琥珀酸衍生物的方法,其包括在具有手性膦配体的过渡金属配合物的存在下,对公式7或8的脱氢前体或其混合物进行不对称氢化反应,其中R1和R2独立地为H、盐形成阳离子或最多30个C原子的有机基团,而R3和R4独立地为H或最多30个C原子的有机基团,但要求R3和R4不能同时为H。其中手性膦配体的部分式为10,其中n为0至6,R表示至少一个最多30个C原子的非氢有机基团。