A novel process for preparing a naphthalene derivative of the formula: ##STR1## wherein R.sup.1 and R.sup.2 are a lower alkoxycarbonyl group or both may combine to form a group of the formula ##STR2## one of R.sup.3 and R.sup.4 is hydrogen atom or a lower alkoxy group and the other is a lower alkoxy group; ring A is a substituted or unsubstituted benzene ring, which is useful as a hypolipidemic agent, and a novel intermediate of the formula: ##STR3## wherein R1, R2, R3, R4 and ring A are the same as defined above.
一种制备
萘衍
生物的新工艺,其
化学式为:##STR1## 其中R1和R2是较低的羧甲氧基基团,或者两者可以结合形成下列式的基团:##STR2## R3和R4中的一个是氢原子或较低的烷氧基基团,另一个是较低的烷氧基基团;环A是取代或未取代的苯环,可用作降脂药物,以及一种新的中间体的
化学式:##STR3## 其中R1、R2、R3、R4和环A的定义与上述相同。