Potent, Selective, and Orally Bioavailable Tricyclic Pyridyl Acetamide N-Oxide Inhibitors of Farnesyl Protein Transferase with Enhanced in Vivo Antitumor Activity
- 17 April 1998
- journal article
- Published by American Chemical Society (ACS) in Journal of Medicinal Chemistry
- Vol. 41 (10) , 1561-1567
- https://doi.org/10.1021/jm980013b
Abstract
We previously reported compound 1 as a potent farnesyl protein transferase (FPT) inhibitor that exhibited reasonable pharmacokinetic stability and showed moderate in vivo activity against a variety of tumor cell lines. The analogous C-11 single compound, pyridylacetamide 2, was found to be more potent than 1 in FPT inhibition. Further studies showed that modification of the ethano bridge of the tricyclic ring system by conversion into a double bond with concomitant introduction of a single bond at C-11 piperidine resulted in compound 3 that had superior FPT activity and pharmacokinetic stability. Compound 4, a 5-bromo-substituted analogue of 3, showed improved FPT activity, had good cellular activity, and demonstrated a remarkably improved pharmacokinetic profile with AUC of 84.9 and t1/2 of 82 min. Compound4 inhibited the growth of solid tumor in DLD-1 model by 70% at 50 mpk and 52% at 10 mpk.Keywords
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