申请人:Hoffmann-La Roche Inc.
公开号:US04775756A1
公开(公告)日:1988-10-04
The invention relates to substituted phenylbarbituric acids of the formula ##STR1## wherein R.sup.1 and R.sup.3, independently, are lower-alkoxy or lower-alkylthio; R.sup.2 is lower-alkoxy, hydroxy or amino; and R.sup.4 is hydrogen; or R.sup.1 and R.sup.2 are lower-alkoxy, R.sup.3 is hydrogen and R.sup.4 is lower-alkyl, which are prepared from correspondingly substituted benzene derivatives and alloxan. The compounds of formula I can be converted into substituted benzaldehydes which in turn are known intermediates in the preparation of pharmaceutically valuable benzylpyrimidines.
该发明涉及公式##STR1##中的取代苯基巴比妥酸,其中R.sup.1和R.sup.3分别独立地是较低的烷氧基或较低的烷基硫基;R.sup.2是较低的烷氧基、羟基或氨基;R.sup.4是氢;或者R.sup.1和R.sup.2是较低的烷氧基,R.sup.3是氢,R.sup.4是较低的烷基,这些化合物从相应的取代苯衍生物和尿固醇制备而成。公式I的化合物可以转化为取代苯甲醛,而这反过来是制备具有药用价值的苄基嘧啶的已知中间体。