A process for the preparation of a substituted acetic acid of the Formula (2): ##STR1## wherein --X--Z is an optionally substituted aromatic or heteroaromatic optionally substituted amino radical; by reacting a compound of the Formula (7): Z--Y--H Formula 7 with glyoxylic acid. The compounds of Formula (2) are useful as intermediates in the preparation of polycyclic dyes.
一种制备式(2)的取代
乙酸的方法:##STR1## 其中--X--Z是可选取代的芳香或杂环芳香可选取代的
氨基基团;通过将式(7)的化合物:Z--Y--H式7与
草酰乙酸反应。式(2)的化合物可用作多环
染料的制备中间体。