ASYMMETRIC CATALYST AND PROCESS FOR PREPARING OPTICALLY ACTIVE ALCOHOLS USING THE SAME
申请人:Watanabe Masahito
公开号:US20100261924A1
公开(公告)日:2010-10-14
The present invention provides an organic metal compound, a ligand, an asymmetric catalyst, and a process for preparing optically-active alcohols using the asymmetric catalyst. The organic metal compound of the present invention is expressed by the following general formula (1):
wherein in general formula (1), R
1
and R
2
are a mutually identical or mutually different, unsubstituted or substituted alkyl group, aryl group, cycloalkyl group, or R
1
and R
2
are bound to form an alicyclic ring, R
3
is a hydrogen atom or an alkyl group, R
4
is a branched alkyl group or an alkyl group that does or does not form a ring by itself, or an unsubstituted or substituted aryl group, or an unsubstituted or substituted heterocyclic group, Ar is an unsubstituted or substituted cyclopentadienyl group that is bound to M via a π bond, or an unsubstituted or substituted benzene, X is a hydride group or an anionic group, M is ruthenium, rhodium or iridium, L is a solvent molecule or a water molecule, l is 1 or 2, m is an integer from 0 to 2, n is 0 or 1, and when n is 0, X does not exist, and * represents asymmetric carbon, wherein R
4
is not a camphor group, a camphor derivative group, an isopropyl group or a phenyl group whenever R
1
and R
2
are both a phenyl group.
本发明提供一种有机金属化合物、配体、不对称催化剂以及利用该不对称催化剂制备光学活性醇的方法。本发明的有机金属化合物由以下通用式(1)表示:
在通用式(1)中,R1和R2是相互相同或相互不同的未取代或取代的烷基基团、芳基团、环烷基团,或R1和R2结合形成脂环,R3是氢原子或烷基基团,R4是支链烷基基团或自身形成环或不形成环的烷基基团,或未取代或取代的芳基团,或未取代或取代的杂环基团,Ar是通过π键与M结合的未取代或取代的环戊二烯基团,或未取代或取代的苯,X是氢化物基团或阴离子基团,M是钌、铑或铱,L是溶剂分子或水分子,l为1或2,m为0到2的整数,n为0或1,当n为0时,X不存在,*代表不对称碳,其中当R1和R2均为苯基团时,R4不是藿香基团、藿香衍生基团、异丙基团或苯基团。