4-Isopropyl-4'-nitrobenzophenone and a process for the preparation of 4'-nitrobenzophenones substituted in the 4-position

US4413144A · kind A · utility

Assignee

• Cassella Aktiengesellschaft · DE

Inventors

• Horst Tappe · Dietzenbach, DE
• Herbert Wille · Frankfurt, DE

Key dates

• Filing date: Mar 29, 1982
• Grant date: Nov 1, 1983
• Expiry date: Mar 29, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B29/363
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

4-Isopropyl-4'-nitrobenzophenone and other benzophenones of the formula ##STR1## wherein R is hydrogen, alkyl having 1 to 20 carbon atoms, alkoxy having 1 to 20 carbon atoms, alkyl having 2 to 20 carbon atoms interrupted by oxygen, or alkoxy having 2 to 20 carbon atoms interrupted by oxygen, are prepared by reacting a substituted benzene compound of the formula ##STR2## with p-nitrobenzoyl halide at temperatures of 10.degree. to 140.degree. C. in the presence of a Friedel-Crafts catalyst and an inert solvent which is an aliphatic hydrocarbon, a chlorinated aliphatic hydrocarbon or chlorinated aromatic hydrocarbon.