Acetic Acid → (4-Aminophenyl)(4-isopropylphenyl)methanone

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Reaction Conditions

Reaction Steps

800 parts of water, 250 parts of iron chips and 28 parts of acetic acid are initially introduced, and the mixture is heated to 95° C. and stirred for 1 hour at 95° C. It is then cooled to 90° C., 800 parts of ethanol are added, and 55 parts of 4-isopropyl-4'-nitrobenzophenone are added in a solid form in small portions in the course of 30 minutes. The mixture is heated for 8 hours under reflux, its pH is adjusted to 9 by means of 44 parts of sodium carbonate solution, 600 parts of ethanol are added, heating under reflux is carried out for 15 hours, the mixture is filtered hot and the residue is washed three times with 200 parts each of hot ethanol. Ethanol is distilled off from the combined filtrates and the aqueous bottom is cooled down. The precipitated crystals are then filtered off and dried in vacuo. 45.5 parts of 4-isopropyl- 4'-aminobenzophenone having a melting point of 110° C. are obtained. The valuable dyestuff of the formula VI ##STR7## can be prepared from 4-isopropyl-4'-aminobenzophenone as indicated in German Offenlegungsschrift No. 2,001,821, Table 1, Example 15.

Provenance & Evidence