申请人:DSM N.V.
公开号:EP0860439A1
公开(公告)日:1998-08-26
The invention relates to a process for preparing an optically active trans-compound having formula (1), in which R represents a phenyl group, whether or not substituted, preferably p-methoxyphenyl, and A is derived from an optically active compound, in which an aldehyde having formula (2), in which R is as defined above, is, in the presence of a base, brought into contact with an optically active acetyl compound having formula (3), in which X represents a leaving group and in which A is derived from an amino alcohol, preferably a β-amino alcohol having a rigid structure.
Particularly good results were obtained when use was made of a compound having formula (3), in which A is derived from an amino indanol compound having formula (4), in which R1 and R2 represent a (hetero)alkyl or (hetero)aryl group, whether or not substituted, having 1-10 C atoms, or R1 and R2 constitute an aromatic or aliphatic ring together with the N atom to which they are bound, in particular in which R1 and R2 each independently of one another represent methyl, ethyl, isopropyl, n-propyl, n-butyl, allyl, benzyl or tosyl.
本发明涉及一种制备具有式(1)的光学活性反式化合物的工艺,式(1)中 R 代表苯基,无论是否被取代,最好是对甲氧基苯基,A 来自光学活性化合物,其中具有式(2)的醛、式(3)的光学活性乙酰基化合物接触,其中 X 代表离去基团,A 来自氨基醇,最好是具有刚性结构的 β-氨基醇。
当使用具有式(3)的化合物时,可获得特别好的效果,其中 A 由具有式(4)的氨基茚醇化合物衍生而来,式(4)中 R1 和 R2 代表具有 1-10 个 C 原子的(杂)烷基或(杂)芳基,或 R1 和 R2 代表具有 1-10 个 C 原子的(杂)烷基或(杂)芳基,或 R1 和 R2 代表具有 1-10 个 C 原子的(杂)烷基或(杂)芳基、其中 R1 和 R2 各自独立地代表甲基、乙基、异丙基、正丙基、正丁基、烯丙基、苄基或甲苯基。