申请人:——
公开号:US20030017942A1
公开(公告)日:2003-01-23
A chiral catalyst comprising a 3,4-disubstituted pyridine, or a salt, N functionalized derivative, dimer or oligomer thereof, wherein the 3-substituent is substantially hindered from rotation about the bond (sp
2
-sp
2
biaryl axis) linking it to pyridine and the 4-substituent is an aliphatic or aromatic amine linked by a single bond to the pyridine, the pyridine nitrogen being functionalized or unfunctionalized, preferably comprising a compound of formula I
1
wherein Z is a group substantially hindered from rotation about its bond; and
each of R
1
and R
2
are independently selected from C
1-30
alkyl, C
3-30
cyclo alkyl and/or C
3-30
aryl, or NR
1
R
2
form a cyclic amine; wherein R
1
and/or R
2
may be optionally substituted and/or include one or more heteroatoms; a composition or support comprising the catalyst; process for the preparation and resolution thereof; process for stereoselective reaction of an optically inactive substrate using the catalyst; and the optically active reaction product thereof.
一个手性催化剂,包括3,4-二取代吡啶,或盐,N官能化衍生物,二聚体或寡聚体,其中3-取代基在与吡啶链接的键(sp2-sp2双芳基轴)周围受到明显阻碍旋转,4-取代基是与吡啶通过单键连接的脂肪族或芳香族胺,吡啶氮原子被官能化或未官能化,最好包括一个化合物的公式I1,其中Z是在其键周围受到明显阻碍旋转的基团;和R1和R2分别独立地选择自C1-30烷基,C3-30环烷基和/或C3-30芳基,或NR1R2形成环状胺;其中R1和/或R2可以选择性地被取代和/或包含一个或多个杂原子;包括催化剂的组合物或载体;制备和分离的方法;使用催化剂对光学不活性底物进行立体选择性反应的方法;以及光学活性反应产物。