Method of making sulfanatophenyl substituted porphines

摘要

The present invention relates to improved methods of making Cu-meso-tetra-(4-sulfanatophenyl)-porphine (designated p-CuTPPS4). The improved processes allow the production of p-CuTPPS4 at lower cost and higher yields compared to conventional methods of making p-CuTPPS4. The present invention further relates to methods of making Cu-meso-tetra-(2-sulfanatophenyl)-porphine (designated o-CuTPPS4) and the use of o-CuTPPS4 as a colorant stabilizer for a variety of colorants, especially magenta colorants. The o-CuTPPS4, according to the present invention, provides a more stable and more "blue" colorant stabilizer compared to known colorant stabilizers, such as Cu-meso-tetra-(p-phenylcarboxylic acid)-porphine.