[EN] PROCESS FOR THE ENANTIOMERIC ENRICHMENT OF DIARYLOXAZOLINE DERIVATIVES<br/>[FR] PROCÉDÉ POUR L'ENRICHISSEMENT ÉNANTIOMÉRIQUE DE DÉRIVÉS DE DIARYLOXAZOLINE
申请人:NOVARTIS AG
公开号:WO2014090918A1
公开(公告)日:2014-06-19
The present invention concerns a process for the manufacture of the S-enantiomer of a compound of formula (I) wherein the variables are as defined in the specification and claims, comprising the steps of (A) separating a racemic compound of formula (II) wherein R', R"and R'" and Y are as defined above and Z is Q; or is halogen, amino, carboxy (-COOH); into the enantiomers and collecting the S-enantiomer; (B) if Z is other than Q, converting the S-enantiomer of formula (II) from step (A) to a S- enantiomer of formula (I); (C) racemizing the R-enantiomer of formula (II) from step (A) in a reaction medium comprising a base and an aprotic organic solvent at a temperature of from 30°C to 150°C, and (D) subjecting the racemate from step (C) to a further manufacturing cycle comprising step (A) and optionally (B). Accordingly, a cyclic process is provided, wherein the undesired enantiomer of a first enantiomer separation step is racemized and then phased in a further enantiomer separation step.
本发明涉及一种制备式(I)化合物的S-对映体的方法,其中变量如规范和权利要求中所定义,包括以下步骤:(A)将式(II)的外消旋化合物分离,其中R'、R"和R'"和Y如上所定义,Z为Q;或者是卤素、氨基、羧基(-COOH),并收集S-对映体;(B)如果Z不是Q,则将步骤(A)中的式(II)的S-对映体转化为式(I)的S-对映体;(C)在包括碱和无水有机溶剂的反应介质中,将步骤(A)中的式(II)的R-对映体消旋化,温度为30℃至150℃;(D)将步骤(C)中的外消旋体进行进一步的制造循环,包括步骤(A)和可选的步骤(B)。因此,提供了一种循环过程,其中第一对映体分离步骤的不需要的对映体被消旋化,然后在进一步的对映体分离步骤中被分离。