Process for preparing substituted chloroaromatics

US5648570A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Heinz Landscheidt · Duisburg, DE
• Witold Broda · Neunkirchen, DE
• Alexander Klausener · Neunburg vorm Wald, DE

Key dates

• Filing date: Jun 21, 1996
• Grant date: Jul 15, 1997
• Expiry date: Jun 21, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C17/16
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Substituted chloroaromatics are obtained in a simple manner in virtually isomer-free form when substituted phenols of the formula (II) ##STR1## where R.sup.1 to R.sup.5 are each, independently of one another, hydrogen, C.sub.1 -C.sub.10 -alkyl, unsubstituted or substituted C.sub.6 -C.sub.10 -aryl or halogen, with at least one of these radicals being different from hydrogen, are reacted with dichlorotriphenylphosphorus.