(3,4';4,5)-Pyrido (3,2-g)-furo coumarins or (3,4-h) pyrido psoralens process of preparation, applications in cosmetology and in therapeutics, and cosmetological and pharmaceutical compositions with them

US4465691A · kind A · utility

Assignee

• Institut National de la Sante et de la Recherche Medicale (INSERM) · FR

Inventors

• Emile Bisagni · Orsay, FR
• Jacqueline Morin · Gif-sur-Yvette, FR
• Dietrich Averbeck · L'Haÿ-les-Roses, FR
• Dubertret Louis · Paris, FR

Key dates

• Filing date: Feb 24, 1983
• Grant date: Aug 14, 1984
• Expiry date: Feb 24, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D491/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Pyrido (3,4', 4,5) furo (3,2-g) coumarins or pyrido (3,4-h) psoralens having formula I ##STR1## wherein R is a hydrogen radical or a lower alkyl group having from 1 to 4 carbon atoms and R" is a methyl group or a methoxy group. These compounds are photobiologically active and are useful or medicinals and pharmaceutical compositions in association with ultraviolet radiation for treating skin diseases and as cosmetic compositions for skin pigmentation.