ENANTIOMERICALLY PURE SUBSTITUTED OXAAZA COMPOUNDS, SALTS OF THE SAME, AND PROCESSES FOR THE PREPARATION OF BOTH
申请人:DAIICHI PHARMACEUTICAL CO., LTD.
公开号:EP1088825A1
公开(公告)日:2001-04-04
This invention provides a method for conveniently obtaining a compound of formula (Ia) which is a production intermediate of antimicrobial compounds, in which a salt of optically active acid of formula (IIIa) is obtained by allowing a compound of formula (I), a ketone compound and an optically active acid to react with one another, converted into its free form and then hydrolyzed.
(In the formula, R1: hydrogen atom or alkyl, aryl or aralkyl group; R2: hydrogen atom or alkyl, aryl, aralkyl, acyl, alkyloxycarbonyl, aralkyloxycarbonyl or substituted sulfonyl; these may further have substituents.)
本发明提供了一种方便地获得作为抗菌化合物生产中间体的式(Ia)化合物的方法,在该方法中,通过使式(I)化合物、酮化合物和光学活性酸相互反应,得到式(IIIa)光学活性酸盐,将其转化为游离态,然后水解。
(式中,R1:氢原子或烷基、芳基或芳烷基;R2:氢原子或烷基、芳基、芳烷基、酰基、烷氧羰基、烷氧羰基或取代磺酰基;这些基团可进一步具有取代基)。