Asymmetric catalyst and process for preparing optically active alcohols using the same
申请人:Kanto Kagaku Kabushiki Kaisha
公开号:EP2239057A1
公开(公告)日:2010-10-13
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), R1 and R2 are a mutually identical or mutually different, unsubstituted or substituted alkyl group, aryl group, cycloalkyl group, or R1 and R2 are bound to form an alicyclic ring, R3 is a hydrogen atom or an alkyl group, R4 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, 1 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 R4 is not a camphor group, a camphor derivative group, an isopropyl group or a phenyl group whenever R1 and R2 are both a phenyl group.
本发明提供了一种有机
金属化合物、一种
配体、一种不对称
催化剂以及一种使用该不对称
催化剂制备光学活性醇的工艺。本发明的有机
金属化合物由以下通式(1)表示:
其中通式(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、芳基、
环烷基,或 R1 和 R2 结合形成脂环,R3 是
氢原子或烷基,R4 是支链烷基或本身形成或不形成环的烷基,或未取代或取代的芳基,或未取代或取代的杂环基、Ar 是通过 π 键与 M 结合的未取代或取代的
环戊二烯基,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、1 是 1 或 2,m 是 0 至 2 的整数,n 是 0 或 1,当 n 为 0 时,X 不存在,* 代表不对称
碳,其中当 R1 和 R2 都是
苯基时,R4 不是
樟脑基团、
樟脑衍
生物基团、
异丙基团或
苯基。