| 摘要 |
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 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.
|
