申请人:Laboratoires Syntex S.A.
公开号:US04920225A1
公开(公告)日:1990-04-24
Optically active compounds of formula 1 ##STR1## wherein R.sub.1 is H or lower alkyl; R.sub.2 and R.sub.6 are each independently lower alkyl, aryl, or arylalkyl; R.sub.3 is CN, NO.sub.2, CO.sub.2 R.sub.5, CONHR.sub.5, SO.sub.2 R.sub.5, or P(O)(OR.sub.5).sub.2, where R.sub.5 is lower alkyl, lower alkoxyalkyl, aryl, or arylalkyl; R.sub.4 is aryl, heterocyclyl, or fused-ring heterocyclyl, optionally substituted with one, two, or three halo, NO.sub.2, CN, lower alkyl, lower alkoxy, lower alkylamino, CF.sub.3, OCH.sub.2 F, or OCF.sub.3 ; are prepared by fractional crystallization from hot organic solvent and water in the presence of a suitable optically active amine base.
式1中的光学活性化合物为 ##STR1## 其中R.sub.1为H或较低的烷基;R.sub.2和R.sub.6各自独立为较低的烷基、芳香基或芳香基烷基;R.sub.3为CN、NO.sub.2、CO.sub.2R.sub.5、CONHR.sub.5、SO.sub.2R.sub.5或P(O)(OR.sub.5).sub.2,其中R.sub.5为较低的烷基、较低的烷氧基烷基、芳香基或芳香基烷基;R.sub.4为芳香基、杂环基或融合环杂环基,可选地带有一个、两个或三个卤素、NO.sub.2、CN、较低的烷基、较低的烷氧基、较低的烷基氨基、CF.sub.3、OCH.sub.2F或OCF.sub.3的取代基;通过在适当的光学活性胺碱存在下,在热的有机溶剂和水中分级结晶制备。