申请人:Nisshin Flour Milling Co., Ltd.
公开号:US04016196A1
公开(公告)日:1977-04-05
Process for preparing a 2-hydroxy-butenoic acid derivative of the general formula, ##STR1## wherein R.sup.1 is a group selected from aliphatic, alicyclic or aromatic radicals and R.sup.2 is a lower alkyl group by heating a glycidic acid derivative having the general formula, ##STR2## wherein R.sup.1 and R.sup.2 is as defined above or for preparing a pyruvic acid derivative of the general formula, ##STR3## wherein R.sup.1 and R.sup.2 are as defined above by heating the glycidic acid derivative of the above mentioned formula (I) or the 2-hydroxy-butenoic acid derivative of formula (II) in the presence of an electrophilic agent.
制备通式为 ##STR1## 的2-羟基丁烯酸衍生物的方法,其中R1为脂肪族、脂环族或芳香族基团,R2为低级烷基,通过加热具有通式 ##STR2## 的环氧乙酸衍生物,其中R1和R2如上定义;或者制备通式为 ##STR3## 的丙酮酸衍生物的方法,其中R1和R2如上定义,通过加热上述通式(I)的环氧乙酸衍生物或通式(II)的2-羟基丁烯酸衍生物,在亲电试剂存在下进行。