The present invention provides a novel ligand represented by the following formula and a novel transition metal complex having the ligand, which shows superior enantioselectivity and catalytic efficiency, particularly high catalyst activity, in various asymmetric synthesis reactions.
A transition metal complex having, as a ligand, a compound represented by the formula
wherein R
4
is a hydrogen atom or a C
1-6
alkyl group optionally having substituent(s), and R
5
and R
6
are each a C
1-6
alkyl group optionally having substituent(s), or the formula
is a group represented by the formula
wherein ring B is a 3- to 8-membered ring optionally having substituent(s).
本发明提供了一种新型
配体,其由以下式表示,并具有该
配体的新型过渡
金属配合物,其在各种不对称合成反应中表现出优异的对映选择性和催化效率,特别是高催化活性。
一种具有以下式表示的化合物作为
配体的过渡
金属配合物:
其中,R4是
氢原子或C1-6烷基,可选地具有取代基;R5和R6是每个C1-6烷基,可选地具有取代基;或者式(I)是由以下式表示的基团:
其中,环B是3-至8-成员环,可选地具有取代基。