申请人:Ube Industries, Ltd.
公开号:US05717124A1
公开(公告)日:1998-02-10
A process for preparing an oxyglutaric acid ester derivative of the formula: ##STR1## in which each of R.sup.1 and R.sup.2 is C.sub.1-5 alkoxy, C.sub.1-7 aralkyloxy, C.sub.7-9 halogenated aralkyloxy or phenyl, R.sup.4 is a hydroxyl-protecting group, and R.sup.5 is C.sub.1-10 alkyl which may have a substituent, comprises the steps of reacting a methyl phosphonate derivative or methyl phosphine oxide derivative with an oxyglutaric acid mono-ester to give a reaction product which comprises an oxyglutaric acid derivative having a phosphorus-containing group and a pentenedioic acid mono-ester (by-product), removing the pendenedioic acid mono-ester from the reaction product to isolate the oxyglutaric acid derivative, and converting the isolated oxyglutaric acid derivative into the oxyglutaric acid ester derivative. A process for obtaining an optically active oxyglutaric acid ester derivative is also disclosed.
制备一种氧谷酸酯衍生物的方法,其化学式为:##STR1## 其中R.sup.1和R.sup.2分别为C.sub.1-5烷氧基,C.sub.1-7芳基烷氧基,C.sub.7-9卤代芳基烷氧基或苯基,R.sup.4为羟基保护基,R.sup.5为C.sub.1-10烷基,可以有取代基。该方法包括以下步骤:将甲基膦酸酯衍生物或甲基膦氧化物衍生物与氧谷酸单酯反应,得到反应产物,其中包括含磷基团的氧谷酸衍生物和戊二烯二酸单酯(副产物),将戊二烯二酸单酯从反应产物中去除以分离氧谷酸衍生物,然后将分离的氧谷酸衍生物转化为氧谷酸酯衍生物。还公开了一种获得光学活性氧谷酸酯衍生物的方法。