Process for the manufacture of bis-benzoxazolyl-stilbene compounds

US4282355A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Rudiger Erckel · Eppstein, DE
• Peter Jurges · Eppstein, DE

Key dates

• Filing date: Feb 14, 1980
• Grant date: Aug 4, 1981
• Expiry date: Feb 14, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D263/64
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Process for the manufacture of bis-benzoxazolyl-stilbene compounds which comprises the chlorination in an inert organic solvent of benzoxazolyl-stilbene carboxylic acid, addition of a solution of an aminophenol in an aprotic, dipolar solvent to the acid chloride thus obtained and subsequent cyclization in the presence of an acid catalyst of the acyl compound obtained.