申请人:——
公开号:US20030199713A1
公开(公告)日:2003-10-23
Catalyst for the asymmetric (transfer) hydrogenation represented by the formula ML
a
X
b
S
c
, where M is a transition metal, to be chosen from rhodium and ruthenium, and X is a counter ion and S is a ligand, a ranges from 0.5 to 3 and b and c, each independently, range from 0 to 2, and L is a chiral ligand having the formula (1), where C
n
together with the two 2 O-atoms and the P-atom forms a substituted or non-substituted ring with 2-4 C-atoms, R
1
and R
2
each independently represent H, an optionally substituted alkyl, aryl, alkaryl or aralkyl group or may form a (heterocyclic) ring together with the N-atom to which they are bound. And a process for the asymmetric (transfer) hydrogenation of an olefinically unsaturated compound, ketone, imine or oxime derivate in the presence of a hydrogen donor and of a catalyst, use being made of a catalyst represented by formula ML
a
X
b
S
c
, where M is a transition metal, to be chosen from rhodium, iridium and ruthenium, X is a counter ion, S is a ligand, a ranges from 0.5 to 3 and b and c range from 0 to 2, and L is a chiral ligand having the formula (1), where C
n
together with the two 2 O-atoms and the P-atom forms a substituted or non-substituted ring with 2-4 C-atoms; and R
1
and R
2
are as defined above.
催化剂用于不对称(转移)氢化反应,其表示为M为过渡金属,可选自铑和钌,X为反离子,S为配体,a范围为0.5至3,b和c各自独立地范围为0至2,L为手性配体,其化学式为(1),其中Cntogether与两个氧原子和磷原子形成具有2-4个碳原子的取代或非取代环,R1和R2各自独立地代表氢,或可选地取代的烷基,芳基,烷芳基或芳烷基,或者与它们结合的氮原子一起形成(杂环)环。一种用于不对称(转移)氢化烯烃不饱和化合物,酮,亚胺或肟衍生物的方法,在氢供体和催化剂存在下进行,所用催化剂的化学式为MLaXbSc,其中M为过渡金属,可选自铑,铱和钌,X为反离子,S为配体,a范围为0.5至3,b和c范围为0至2,L为手性配体,其化学式为(1),其中Cntogether与两个氧原子和磷原子形成具有2-4个碳原子的取代或非取代环;R1和R2如上所定义。