NOTESvol. 27we have found that -fluoroanthraquinones react with aliphatic amines under extremely mild conditions to give the corresponding aminoanthraquinones. This reactivity is particularly useful where the amine involved is heat-sensitive, or where the reactive -nitroanthraquinones cannot be used because of redox reactions with substituents on the amine. Both of these conditions are successfully met in our preparation of 1,5bis [/3-(2 ',5 '-dihydroxyphenyl) -methylethylamino ] anthraquinone.
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