Basf Aktiengesellschaft

Alfred Schuhmacher

Jochem Henkelmann

Hardo Siegel

Manfred Eggersdorfer

Walter Grosch

Heinrich Hiller

Wolfgang Jentzsch

Karl-Erich Kling

Aromatics are acylated by the Friedel-Crafts method by carrying out the acylation in the presence of metalalkyls or metalalkyl halides of metals or semimetals of main groups two to five and/or of metals of subgroups two or four of the Periodic Table.

Acylation of aromatics

Alkyl-substituted aromatic ketones are prepared by reacting alkylbenzenes with carboxylic anhydrides in the presence of a Friedel-Crafts catalyst by performing the reaction in the presence of a tertiary amine or diamine.

Preparation of alkyl-substituted aromatic ketones

A process for the manufacture of Bz-1-bromobenzanthrone by brominating finely divided benzanthrone in aqueous suspension, wherein the improvement comprises treating benzanthrone having a mean particle size of 30 .mu.m or less with bromine or brominating agent at above 80.degree. C. A product which contains from 91 to 94% by weight of Bz-1-bromobenzanthrone is obtained.

Manufacture of Bz-1-bromobenzanthrone

Direct production of 1,9-anthrapyrimidine-2-carboxylic acid-1'-anthraquinonylamide in pigmentary form by reaction of 1,9-anthrapyrimidine-2-carboxylic acid chloride with 1-amino-anthraquinone in a polar water-miscible aprotic solvent. The dye is obtained in a high yield and in a very finely divided and pure form. The isolated reaction product may be used direct as a pigment.

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Ludwigshafen, Germany

Alfred Schuhmacher