| 摘要 |
NEW MATERIAL:A 5,6,7,8-tetrafluoroquinizarin shown by the formula (X and Y are fluorine, chlorine, bromine, iodine, or H). EXAMPLE:2,3,5,6,7,8-Hexafluoroquinizarin. USE:Disperse dye or pigment having high light resistance and heat resistance, or disperse dye having high light resistance and heat resistance, or a raw material for pigment, etc. PREPARATION:For example, tetrafluorophthalic anhydride is reacted with hydroquinone or 1,4-dimethoxybenzene by Friedel-Crafts reaction, to give 5,6,7.8- tetrafluoroquinizarin in the compound shown by the formula.
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