Preparation of substituted aromatic compounds

US6657093B2 · kind B2 · utility

Assignee

• Clariant Corporation · DE

Inventors

• Andreas Meudt · Hofheim, DE
• Michael Erbes · Frankfurt, DE
• Klaus Forstinger · Kelsterbach, DE

Key dates

• Filing date: Jun 13, 2002
• Grant date: Dec 2, 2003
• Expiry date: Jun 13, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D213/50
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing compounds of the formula (II), where the substituents R1 to R5 are each independently H, CH3, straight-chain or branched C1-C8-alkyl, CH(OC1-C5-alkyl)2, CH(C1-C5-alkyl)(OC1-C5-alkyl), CH2(OC1-C5-alkyl), CH(CH3)(OC1-C5-alkyl), C1-C8-alkoxy, N(C1-C5-alkyl)2, phenyl, substituted phenyl, aryl, heteroaryl, S(C1-C5-alkyl) or a radical Caryl, alkyl, andthe symbols X1 to 5 are each carbon.