申请人:TAOKA CHEMICAL CO., LTD
公开号:EP0468821A1
公开(公告)日:1992-01-29
A process for preparing rhodamines represented by the following general formula (I) or (II):
wherein R₁, R₂, and R₃ are independently hydrogen or a lower alkyl, group, but R₁ and R₂ are not both hydrogen which comprises subjecting phthalic anhydride and N-substituted-m-aminophenols represented by the following general formula (III):
wherein R₁, R₂, and R₃ have the above-described meanings, to condensation reaction in one or more organic solvents selected from the group consisting of halogentated and/or alkylated aromatic hydrocarbons or aliphatic hydrocarbons.
一种制备以下一般式(I)或(II)所代表的罗丹明的方法:其中R₁、R₂和R₃独立地为氢或较低的烷基,但R₁和R₂不同时为氢,该方法包括将邻苯二甲酸酐和以下一般式(III)所代表的N-取代的间氨基酚进行缩合反应,其中R₁、R₂和R₃具有上述所述的含义,在从卤代芳烃和/或烷基芳烃或脂肪烃组成的有机溶剂中进行。