5,5'- POSITION LINKED 1,1'- BIPHENYL AXIAL CHIRAL LIGAND AND METHOD FOR PREPARING THE SAME
申请人:Zhang Wanbin
公开号:US20090156829A1
公开(公告)日:2009-06-18
The present invention relates to a 5,5′-position linked 1,1′-biphenyl axis chiral ligand in chemical industry field. The present invention incorporates both the central chirality of oxazoline and the axial chirality of diphenyls. Such ligand can be used in various asymmetric reactions catalyzed by metal with high reactivity and stereoselectivity, and thus represents a good application outlook.
The ligand of the present invention has the formula of:
wherein: n=5, 6, 7, 8, 9, 10, 11 or 12; R
1
=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl; R
2
=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl; R
3
=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl; R
4
=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl.
本发明涉及化工领域中的5,5′-位置连接的1,1′-联苯轴手性配体。本发明结合了噁唑啉的中心手性和二苯基的轴手性。这种配体可以用于由金属催化的各种不对称反应,具有高反应性和立体选择性,因此具有良好的应用前景。本发明的配体具有以下结构式:其中:n=5, 6, 7, 8, 9, 10, 11或12;R1=氢、烷基、取代或未取代芳基、取代或未取代苄基;R2=氢、烷基、取代或未取代芳基、取代或未取代苄基;R3=氢、烷基、取代或未取代芳基、取代或未取代苄基;R4=氢、烷基、取代或未取代芳基、取代或未取代苄基。