申请人:Yamada Tohru
公开号:US20050215832A1
公开(公告)日:2005-09-29
The present invention relates to a process for producing optically active β-nitroalcohols wherein nitroaldol reactions of aldehydes and nitroalkanes are carried out in the presence of a base and an optically active metal complex catalyst represented by the following formula (c):
(where R
4
, R
5
, and R
6
represent a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, an acyl group, an alkoxycarbonyl group, or an aryloxycarbonyl group, and R
5
and R
6
may be linked together to form a ring; X
*
represents a hydrocarbon group having an asymmetric carbon atom or axial asymmetry; M represents a cobalt ion or a chromium ion; and Y represents an anion capable of forming a salt when the valence of M is larger than that of a ligand).
本发明涉及一种制备光学活性β-硝基醇的方法,其中在碱和一种由以下式(c)表示的光学活性金属配合物催化剂存在下,对醛和硝基烷烃进行硝基醇反应:(式中R4、R5和R6代表氢原子、烷基、烯基、芳基、酰基、烷氧羰基或芳氧羰基,R5和R6可连接在一起形成环;X*代表具有不对称碳原子或轴向不对称的碳氢基团;M代表钴离子或铬离子;Y代表一种能够在M的价大于配体的情况下形成盐的阴离子)。