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Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Research Support, U.S. Gov't, P.H.S.
2,4-Diphenyl furan diamidines as novel anti-Pneumocystis carinii pneumonia agents.
Journal of Medicinal Chemistry 1999 June 18
Dicationic 2,4-bis(4-amidinophenyl)furans 5-10 and 2, 4-bis(4-amidinophenyl)-3,5-dimethylfurans 14 and 15 have been synthesized. Thermal melting studies revealed high binding affinity of the compounds to poly(dA-dT) and to the duplex oligomer d(CGCGAATTCGCG)2. All of the new compounds were effective against Pneumocystis carinii pneumonia in the immunosuppressed rat model with up to 200-fold increase in activity compared to the control compound pentamidine. No toxicity was noted for 5, 7-10 at the dose of 10 micromol/kg/d; however, the isopropyl analogue 7 showed toxicity comparable to pentamidine at the dosage of 20 micromol/kg/d. Dimethylation of the parent compound on the furan ring resulted in reduced activity and increased toxicity.
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