Patent ID: 7309796

Claim:
A process for the preparation of diaminocyclohexane-platinum(II)-dicarboxylates comprising the following steps: B) Converting K 2 PtX 4 with 1,2-diaminocyclohexane (DACH) to (2): C) Converting (2) with a silver salt Ag n A to (3): and removal of the resulting AgX precipitate; D) Converting (3) with ammonium oxalate to (1): F) Isolating the product (1), wherein R 1 and R 2 together form a dicarboxylato group, X stands for CI or I, A stands for a 1-2-valent anion of a mineral acid, and n stands for 1 or 2, and wherein in step C an understochiometric amount of silver salt is used.