Patent ID: 8362266
Filing Date: 2013-01-29
Classification: A61P,C07F

Abstract:
1. A method of making the compound M[tetrachlorobis(1H-indazole)ruthenate (III)], wherein M is an alkali metal cation, comprising the steps of, reacting, in an aqueous solution or a mixture of an aqueous solution and a first organic solvent which is water soluble, indazolium trans-[tetrachlorobis(1H-indazole)ruthenate (III)] with an inorganic salt of said alkali metal cation M, to form the compound M[tetrachlorobis(1H-indazole)ruthenate (III)] and an inorganic salt of indazole; and removing said indazole from said M[tetrachlorobis(1H-indazole)ruthenate (III)] by extraction with a second organic solvent which is not substantially water soluble.