Methods of syntheses of phthalocyanine compounds

US5763602A · kind A · utility

Inventors

• Ying-Syi Li · Fremont, US
• Malcolm E. Kenney · Cleveland Heights, US

Key dates

• Filing date: Oct 1, 1996
• Grant date: Jun 9, 1998
• Expiry date: Oct 1, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B47/08
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The present invention provides improved methods for synthesizing phthalocyanines, particularly HOSiPcOSi(CH.sub.3).sub.2 (CH.sub.2).sub.3 N(CH.sub.3).sub.2, which do not involve photolysis, and which produces purity of at least about 95%, and in the preferred embodiment of the first method of synthesis provide a yield of greater than about 70% and typically greater than 80%. The first method involves a method for synthesizing a phthalocyanine compound comprising the following steps: providing a phthalocyanine precursor having a central silicon; adding a first aminosiloxy ligand to the central silicon of the phthalocyanine precursor; adding a second aminosiloxy ligand to the central silicon of the phthalocyanine precursor; displacing the second aminosiloxy ligand by an organic acid ligand, preferably Cl.sub.3 CCOO ligand; then displacing the Cl.sub.3 CCOO ligand with an HO ligand. The second method for making Pc4 is a method for synthesizing a phthalocyanine compound comprising the following steps: providing a phthalocyanine precursor having a central silicon; providing a siloxy ligand with an iodo group; adding a first and second siloxyiodo ligand to the central silicon of the phth…