Byron L. Bennett, Zeynep Kabuloglu, Blair A. Isom, and Tahnee L. Marginean. University of Nevada, Las Vegas, Las Vegas, NV
Synthesis of several 4,4'- dialkyl-2,2'-bipyridine complexes of Pt (II) has been accomplished in an effort to isolate a more effective analogue of Cisplatin by substitution of different polar functional groups at the terminus of the alkyl chain. Treatment of the dilithio-anion of 4,4'-dimethyl-2,2'-bipyridine with the appropriate alkyl halides affords the bipyridyl ligands. Reaction of the bipyridine ligands with (COD)PtCl
2 yields the target Pt (II) complex. 4,4'-Dimethyl-2,2'-bipyridine ligand complexed with PtCl
2 has increased cytotoxicity relative to Cisplatin in cancerous breast, lung, and prostate tissues. There is no clear mechanism established for the action of this complex. However, preliminary results for –CH
2CH
2CH
2X groups in the 4,4'-position also show improved cytotoxicity.
