申请人:DSM N.V.
公开号:US06025506A1
公开(公告)日:2000-02-15
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 .beta.-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 R.sub.1 and R.sub.2 represent a (hetero)alkyl or (hetero)aryl group, whether or not substituted, having 1-10 C atoms, or R.sub.1 and R.sub.2 constitute an aromatic or aliphatic ring together with the N atom to which they are bound, in particular in which R.sub.1 and R.sub.2 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)的光学活性顺反异构体的方法,其中R代表苯基,可以是取代或非取代的,优选为对甲氧基苯基,而A来源于光学活性化合物,其中在碱的存在下,将具有式(2)的醛与具有式(3)的光学活性乙酰化合物接触,其中X代表离去基团,而A来源于氨基醇,优选为具有刚性结构的β-氨基醇。当使用具有式(3)的化合物时,特别好的结果是从具有式(4)的氨基茚醇化合物中获得A,其中R1和R2分别代表具有1-10个C原子的(杂)烷基或(杂)芳基,可以是取代或非取代的,或者R1和R2与它们所连接的N原子一起构成芳香或脂肪环,特别是其中R1和R2分别独立地代表甲基、乙基、异丙基、正丙基、正丁基、烯丙基、苄基或对甲苯磺酰基。