| 摘要 |
PURPOSE: An azo compound or its salt is provided to be produced high yield, and to be suitable for a coloring agent of a color filter used in a display device such as an LCD panel, electroluminescence, and plasma display panel. CONSTITUTION: An azo compound or its salt has a structure of chemical formula (I). A method for preparing the azo compound comprises a step of reacting an azo compound represented by chemical formula (III) and acylating agent. In chemical formulae, R^1 is an organic group with an azo group; R^2 and R^3 are independently substituted or unsubstituted C1-16 aliphatic hydrocarbon group, substituted or unsubstituted C3-16 alicyclic hydrocarbon group, substituted or unsubstituted C7-20 aralkyl group, or substituted or unsubstituted C6-14 aryl group. |
