A compound of the formula ##STR1## wherein R.sub.1 represents a hydrogen atom or a lower alkyl group; R.sub.2 and R.sub.5, independently from each other, represent a hydrogen atom, a halogen atom or a lower alkyl group; one of R.sub.3 and R.sub.4 represents an imido group of the formula ##STR2## in which Y represents a 1,2-phenylene, 1,2-naphthylene, 2,3-naphthylene or 1,8-naphtylene group optionally containing at least one substituent, and the other represents a hydrogen atom, a halogen atom or a lower alkyl group; R.sub.6 represents a hydrogen atom, a halogen atom, a lower alkyl group or a lower alkoxy group; and X represents a halogen atom; with the proviso that when R.sub.3 represents the imido group, R.sub.2 represents a hydrogen or halogen atom. This compound can be prepared by reacting a corresponding quinaldine derivative with a tetrahalophthalic acid or a reactive derivative thereof. A yellow organic pigment comprising this compound as a coloring ingredient is useful for coloring polymeric materials.
化合物的式子为##STR1## 其中R.sub.1代表氢原子或较低的烷基团;R.sub.2和R.sub.5分别独立地代表氢原子、卤素原子或较低的烷基团;R.sub.3和R.sub.4中的一个代表式为##STR2## 其中Y代表1,2-苯撑基、1,2-
萘撑基、2,3-
萘撑基或1,8-
萘撑基,可以含有至少一个取代基,另一个代表氢原子、卤素原子或较低的烷基团;R.sub.6代表氢原子、卤素原子、较低的烷基团或较低的烷氧基;X代表卤素原子;但是当R.sub.3代表imido基时,R.sub.2代表氢原子或卤素原子。该化合物可通过将相应的
喹啉衍
生物与四卤
酞酸或其反应性衍
生物反应制备而成。以该化合物为着色成分的黄色
有机颜料可用于着色聚合材料。