| 摘要 |
<p>PURPOSE:To obtain the titled compound useful as a dye, pigment intermediate, dyestuff for liquid crystals, etc., in high yield under mild conditions, by reacting naphthazarin with aniline in or without an organic solvent in the presence of a boron compound. CONSTITUTION:Naphthazarin expressed by the formula is reacted with aniline in or without an organic solvent in the presence of a boron compound selected from the group consisting of boric acid, boron acetate and boron fluoride to afford the aimed compound. The molar amount of the aniline to be used is preferably about equimolar - 20 times based on the naphthazarin. The amount of the boron compound to be used is preferably about equimolar - 20 times based on the naphthazarin. The addition of the above-mentioned boron com pound provides the aimed 2-anilinaphthazarin having anilino group at the 2-posi tion of the naphthazarin in high yield under mild conditions with suppressed formation of by-products. The reaction temperature is preferably about room temperature.</p> |
