Heterocyclic compounds and porphyrin compounds obtainable therefrom

US5162518A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Bernd Kaletta · Langenfeld, DE
• Meinhard Rolf · Leverkusen, DE
• Walther Wolf · Leverkusen, DE
• David R. Terrell · Lint, BE

Key dates

• Filing date: Jan 17, 1992
• Grant date: Nov 10, 1992
• Expiry date: Jan 17, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B47/00
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Porphyrins of the formula ##STR1## in which the substituents have the meaning given in the description are obtained by heating compounds of the formula ##STR2## if appropriate in the presence of compounds of the formula ##STR3## The porphyrins are used as pigments.