Method for the production of benzophenones

US7253323B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Volker Maywald · Ludwigshafen, DE
• Nico Hoffmann · Bischofswerda, DE
• Michael Keil · Freinsheim, DE
• Uwe Josef Vogelbacher · Ludwigshafen, DE
• Jan Hendrik Wevers · Zörbig, DE

Key dates

• Filing date: Dec 1, 2003
• Grant date: Aug 7, 2007
• Expiry date: Dec 1, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/60
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing benzophenones of the formula I,where X may be chlorine, hydroxyl, methoxy or C1-C6-alkylcarbonyloxy, and Y may be chlorine or bromine, by reacting an acid chloride of the formula IIwhere X and Y are as defined above with 3,4,5-trimethoxytoluene, which comprises carrying out the reaction in the presence of