申请人:——
公开号:US20030144138A1
公开(公告)日:2003-07-31
A novel phosphine compound having excellent properties (chemical selectivity, enantioselectivity, catalytic activity) as a catalyst for asymmetric syntheses, especially asymmetric hydrogenation. A phosphine-phosphorane compound represented by the following general formula:
1
(wherein R
1
represents hydrogen atom or a linear or branched alkyl group having 1 to 4 carbon atoms, R
2
, R
3
, R
4
, and R
5
are the same or different, and each represents hydrogen atom, or an alkyl group having 1 to 6 carbon atoms, etc., and each of R
2
and R
3
, R
3
and R
4
, and R
4
and R
5
may be together combined to form a ring which may contain one or more (preferably 1 to 2) oxygen atoms, and R
6
and R
7
are the same or different, and each represents a linear or branched alkyl group having 1 to 6 carbon atoms, etc.).
一种新型膦化合物,具有优异的性能(化学选择性、对映选择性、催化活性),作为不对称合成催化剂,特别是不对称氢化反应的催化剂。该膦-膦酰化合物由下列通式1表示:其中,R1表示氢原子或具有1至4个碳原子的线性或支链烷基;R2、R3、R4和R5相同或不同,每个表示氢原子或具有1至6个碳原子的烷基等;R2和R3、R3和R4、R4和R5中的每一对可以结合形成一个环,该环可以包含一个或多个(优选1至2个)氧原子;R6和R7相同或不同,每个表示具有1至6个碳原子的线性或支链烷基等。