Coumarin derivatives, a method of preparing them and their use as intermediates

US5650456A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Chen-Chih Yun · Krefeld, DE
• Rolf Wehrmann · Krefeld, DE
• Burkhard Kohler · Leverkusen, DE

Key dates

• Filing date: Feb 9, 1996
• Grant date: Jul 22, 1997
• Expiry date: Feb 9, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K11/06
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

This invention relates to coumarin derivatives of formula (I) ##STR1## where Z represents OR.sup.3 or NR.sup.4 R.sup.5, to their preparation, and to their use for the production of polymers with luminophors on their side chains.