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US 4,062,875 AGranted
Preparation and oxidation of 4-acylamino-anthrones
AssigneeBayer Aktiengesellschaft
InventorsHorst Jager, Erich Klauke
Life of this patent
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Abstract
A 2-acylamino-2'-carboxy-diphenylmethane is treated with an acid condensing agent such as sulfuric acid or chlorosulfonic acid thereby to produce the corresponding 4-acylamino-anthrone which can then be oxidized, as with hydrogen peroxide or oxygen, to the corresponding 1-acylamino-anthraquinone.
Claims13
A process comprising treating a 2-acylamino-2'-carboxy-diphenylmethane with an acid condensing agent, whereby there is formed the corresponding 4-acylamino-anthrone.
Dependencies are inferred from the claim text.