(+)-4-[2-[4-(8-Chloro-3,10-dibromo-6,11-dihydro-5<i>H</i>-benzo[5,6]cyclohepta[1,2-<i>b</i>]- pyridin-11(<i>R</i>)-yl)-1-piperidinyl]-2-oxo-ethyl]-1-piperidinecarboxamide (SCH-66336): A Very Potent Farnesyl Protein Transferase Inhibitor as a Novel Antitumor Agent
作者:F. George Njoroge、Arthur G. Taveras、Joseph Kelly、Stacy Remiszewski、Alan K. Mallams、Ronald Wolin、Adriano Afonso、Alan B. Cooper、Dinananth F. Rane、Yi-Tsung Liu、Jesse Wong、Bancha Vibulbhan、Patrick Pinto、Jeffrey Deskus、Carmen S. Alvarez、Joycelyn del Rosario、Michael Connolly、James Wang、Jagdish Desai、Randall R. Rossman、W. Robert Bishop、Robert Patton、Lynn Wang、Paul Kirschmeier、Mathew S. Bryant、Amin A. Nomeir、C.-C. Lin、Ming Liu、Andrew T. McPhail、Ronald J. Doll、Viyyoor M. Girijavallabhan、Ashit K. Ganguly
DOI:10.1021/jm980462b
日期:1998.11.1
We have previously shown that appropriate modification of the benzocycloheptapyridine tricyclic ring system can provide potent farnesyl protein transferase (FPT) inhibitors with good cellular activity. Our laboratories have also established that incorporation of either pyridinylacetyl N-oxide or 4-N-carboxamidopiperidinylacetyl moieties results in pharmacokinetically stable inhibitors that are orally efficacious in nude mice. We now demonstrate that further elaboration of the tricyclic ring system by introducing a bromine atom at the 7- or the 10-position of the 3-bromo-8-chlorotricyclic ring system provides compounds that have superior potency and selectivity in FPT inhibition. These compounds have good serum levels and half-lives when given orally to rodents and primates. In vitro and in vivo evaluation of a panel of these inhibitors has led to identification of 15 (SCH 66336) as a highly potent (IC50 = 1.9 nM) antitumor agent that is currently undergoing human clinical trials.