Preparation of hydroxylated benzophenones

US5728888A · kind A · utility

Assignee

• BASF SE

Inventors

• Alexander Aumuller · Neustadt, DE
• Gunter Brill · Haßloch, DE
• Peter Bottcher · Usedom, DE

Key dates

• Filing date: Feb 21, 1997
• Grant date: Mar 17, 1998
• Expiry date: Feb 21, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C45/673
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Hydroxylated benzophenonens are prepared from completely or partially methylated hydroxybenzophenones by reacting these methyl ethers with AlCl.sub.3 and subsequently hydrolyzing with water, the reaction being carried out in the presence of one or more compounds from the class of ureas or carboxamides.