申请人:Takasago International Corporation
公开号:EP0614871A1
公开(公告)日:1994-09-14
A process for producing an optically active β- hydroxyketone represented by formula (I):
by catalytic asymmetrical aldol reaction comprises reacting a silyl-enol ether represented by formula (II):
with a substituted aldehyde represented by formula (III):
R⁵CHO (III)
in the presence of a binaphthol-titanium complex represented by formula (IV):
R¹-R⁵ are lower alkyl etc as defined in the specification.
An optically active β-hydroxyketone is efficiently produced with diastereo-specificity and enantio-specif icity and is useful as an intermediate for preparing biologically active substances in the medical and pharmaceutical fields.
一种生产由式(I)代表的光学活性β-羟基酮的工艺:
通过催化不对称醛醇反应,包括使式(II)代表的硅烷基烯醇醚反应:
与式 (III) 所代表的取代醛反应:
R⁵CHO (III)
在式 (IV) 所代表的二萘酚-钛络合物存在下:
R¹-R⁵ 是本说明书中定义的低级烷基等。
这种光学活性的 β-羟基酮可高效制得,具有非对映特异性和对映体特异性,可用作制备医疗和制药领域生物活性物质的中间体。