Abstract
The reactions of K2PtCl4 with pyridine derivatives L (L = py = pyridine, pic = picoline, and lut = lutidine) were studied in dimethylformamide (DMF). .**GRAPHIC**. The [antitumor] complexes were isolated and the yield decreased with the order, 2,4-lut = 2-pic > 2,6-lut > 4-pic = py, which can be correlated to the steric hindrance of the o-methyl groups. The compounds can be converted, the free ligand acting as catalyst, to the final product of the above reactions. The compounds can also be obtained from a DMF solution of [Pt(L)4]Cl2 (L = py) at room temperature. A comparison of the above reactions in water and in DMF was also made.
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