申请人:BASF Aktiengesellschaft
公开号:US04754044A1
公开(公告)日:1988-06-28
Ketene O,N-acetals of the formula I ##STR1## where R.sup.1 is tertiary alkyl of 4 to 6 carbon atoms, R.sup.2 is hydrogen, R.sup.3 is phenyl which is unsubstituted or substituted by halogen, alkoxy, alkyl, phenyl, phenoxy, cyano, nitro or trifluoromethyl and ##STR2## is a triazole, pyrazole, benzimidazole or imidazole radical, are prepared by a process in which a ketene O,O-acetal of the formula II ##STR3## where R.sup.1, R.sup.2 and R.sup.3 have the above meanings and R.sup.4 is phenyl which is unsubstituted or substituted by halogen, alkoxy, alkyl, phenyl, phenoxy, cyano, nitro or trifluoromethyl, is reacted with a compound of the formula ##STR4## where ##STR5## has the above meanings, at elevated temperatures.
式I的Ketene O,N-缩醛,其中R1是4到6个碳原子的三级烷基,R2是氢,R3是苯基,未取代或被卤素、烷氧基、烷基、苯基、苯氧基、氰基、硝基或三氟甲基取代,并且##STR2##是三唑、吡唑、苯并咪唑或咪唑基,通过以下过程制备:将式II的Ketene O,O-缩醛与式##STR4##的化合物反应,其中##STR5##具有上述含义,在升高的温度下进行。