申请人:——
公开号:US20040110975A1
公开(公告)日:2004-06-10
The invention is concerned with new phosphine ligands of formula I
1
wherein
R
1
and R
2
are independently of each other unsubstituted alkyl, aryl, cycloalkyl or heteroaryl, or alkyl, aryl, cycloalkyl or heteroaryl each of which independently is substituted by alkyl, alkoxy, halogen, hydroxy, amino, mono- or dialkylamino, aryl, —SO
2
—R
7
, —SO
3
−
, —CO—NR
8
R
8′
, carboxy, alkoxycarbonyl, trialkylsilyl, diarylalkylsilyl, dialkylarylsilyl or triarylsilyl; R
3
is alkyl, cycloalkyl, aryl or heteroaryl; R
4′
and R
4
are independently of each other hydrogen, alkyl or optionally substituted aryl; or R
4
and R
4
together with the C-atom they are attached, form a 3-8-membered carbocyclic ring; dotted line is optionally a double bond; R
5
and R
6
are independently of each other hydrogen, alkyl or aryl, R
7
is alkyl or aryl; and R
8
and R
8′
are independently of each other hydrogen, alkyl or aryl; the substituents attached by the bold bonds are in cis relation to each other; metal complexes with such ligands in asymmetric reactions.
这项发明涉及一种新的磷配体,其化学式为I1,其中R1和R2分别独立地为未取代的烷基、芳基、环烷基或杂环烷基,或者独立地为被烷基、烷氧基、卤素、羟基、氨基、单烷基氨基或二烷基氨基、芳基、—SO2—R7、—SO3−、—CO—NR8R8′、羧基、烷氧羰基、三烷基硅基、二芳基烷基硅基、二烷基芳基硅基或三芳基硅基取代的烷基、芳基、环烷基或杂环烷基;R3为烷基、环烷基、芳基或杂环烷基;R4'和R4分别独立地为氢、烷基或可选择取代的芳基;或者R4和R4连同它们所连接的碳原子形成一个3-8环碳环;虚线可选为双键;R5和R6分别独立地为氢、烷基或芳基,R7为烷基或芳基;R8和R8'分别独立地为氢、烷基或芳基;由粗线连接的取代基之间呈顺式关系;含有这种配体的金属配合物在不对称反应中的应用。