申请人:Bayer Aktiengesellschaft
公开号:US05183926A1
公开(公告)日:1993-02-02
Aromatic dicarboxylic acids of the formula ##STR1## in which R.sup.1, R.sup.2, m, n, and X have the meaning mentioned in the description, can be prepared from the bisphenols, on which they are based, of the formula ##STR2## if the bisphenols are first reacted to give the bissulphonates, the sulphonate groups are removed catalytically with H.sub.2 and the hydrocarbons obtained in this way are doubly acylated in a known manner and the acyl groups are oxidized to the carboxyl groups. Many of the aromatic dicarboxylic acids which can be prepared in this way are new.
公式为##STR1##的芳香二羧酸,其中R.sup.1、R.sup.2、m、n和X的含义如描述中所述,可以从基于公式为##STR2##的双酚制备而来,如果首先将双酚反应以得到双磺酸酯,然后用H.sub.2催化地去除磺酸基团,以已知方法将获得的烃进行双酰化,然后将酰基氧化为羧基。用这种方法可以制备许多新的芳香二羧酸。