Patent ID: 7547784
Filing Date: 2009-06-16
Classification: A61P,C07F

Abstract:
1. A method for preparing a zinc complex represented by the formula (I) wherein each R is the same or different from each other and each R represents H; an alkyl group having 1 to 16 carbon atoms; an acyl group, a carboxyalkyl group, an acylalkyl group, a carbamoylalkyl group, a cyanoalkyl group, a hydroxyalkyl group, an aminoalkyl group or a haloalkyl group, wherein an alkyl portion of said acyl group, said carboxyalkyl group, said acylalkyl group, said carbamoylalkyl group, said cyanoalkyl group, said hydroxyalkyl group, said aminoalkyl group and said haloalkyl group has 1 to 16 carbon atoms; a carboxyl group; a carbamoyl group; a hydroxyl group; a cyano group; an amino group; or a halogeno group, which comprises adding one or more zinc ions to a solution containing one or more polyamine ligands represented by a formula (II): wherein has the same meaning as defined above, then adjusting the solution to be neutral, and after the adjusting, concentrating the solution, wherein a source of the one or more zinc ions is zinc acetate.