Preparation of naphthalocyanines

US5656752A · kind A · utility

Assignee

• BASF SE

Inventors

• Juergen Kipper · Karlsruhe, DE
• Bernhard Albert · Monsheim, DE

Key dates

• Filing date: Sep 28, 1995
• Grant date: Aug 12, 1997
• Expiry date: Sep 28, 2015

Classification

• Technology area (CPC G): Physics
• CPC primary: G11B7/248
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process is described for preparing alkoxy-octasubstituted metal-free or metal-containing naphthalocyanines by etherification of 1,4-dihydroxy-2,3-dicyanonaphthalene and formation of the metal-free naphthalocyanine with or without subsequent metallization.