申请人:Bayer Aktiengesellschaft
公开号:US04263435A1
公开(公告)日:1981-04-21
Triazolylphenyl-triazines of the formula ##STR1## wherein R.sub.1 and R.sub.2 denote alkyl or aryl and X.sub.1, X.sub.2 and X.sub.3 denote alkyl, aralkyl or cycloalkyl, which are obtainable by reacting corresponding 3-hydroxyphenyl-triazoles with corresponding 2,4-dihydroxy-triazinium compounds, are outstandingly suitable for the preparation of 4-(1,2,3-triazol-2-yl)-salicylaldehydes, which in turn are starting materials for the preparation of optical brighteners of the type of the triazolylcoumarins.
式子如下:##STR1##其中R.sub.1和R.sub.2代表烷基或芳基,X.sub.1、X.sub.2和X.sub.3代表烷基、芳基烷基或环烷基。这些化合物可以通过将相应的3-羟基苯基三唑与相应的2,4-二羟基三唑化合物反应得到,它们非常适合制备4-(1,2,3-三唑-2-基)-水杨醛,这又是制备三唑基香豆素类光亮剂的起始原料。