Abstract
Continuing structure-activity studies were performed on the 2,3,4, 5-tetrahydro-1-(imidazol-4-ylalkyl)-1,4-benzodiazepine farnesyltransferase (FT) inhibitors. These studies demonstrated that a 3(R)-phenylmethyl group, a hydrophilic 7-cyano group, and a 4-sulfonyl group bearing a variety of substituents provide low-nanomolar FT inhibitors with cellular activity at concentrations below 100 nM. Maximal in vivo activity in the mutated K-Ras bearing HCT-116 human colon tumor model was achieved with analogues carrying hydrophobic side chains such as propyl, phenyl, or thienyl attached to the N-4 sulfonyl group. Several such compounds achieved curative efficacy when given orally in this model. On the basis of its excellent preclinical antitumor activity and promising pharmacokinetics, compound 20 (BMS-214662, (R)-7-cyano-2,3,4, 5-tetrahydro-1-(1H-imidazol-4-ylmethyl)-3-(phenylmethyl)-4-(2-thie nyl sulfonyl)-1H-1,4-benzodiazepine) has been advanced into human clinical trials.
MeSH terms
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3T3 Cells
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Alkyl and Aryl Transferases / antagonists & inhibitors*
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Animals
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Antineoplastic Agents / chemical synthesis*
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Antineoplastic Agents / chemistry
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Antineoplastic Agents / pharmacokinetics
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Antineoplastic Agents / pharmacology
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Benzodiazepines / chemical synthesis*
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Benzodiazepines / chemistry
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Benzodiazepines / pharmacokinetics
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Benzodiazepines / pharmacology
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Biological Availability
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Cell Line, Transformed
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Enzyme Inhibitors / chemical synthesis*
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Enzyme Inhibitors / chemistry
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Enzyme Inhibitors / pharmacokinetics
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Enzyme Inhibitors / pharmacology
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Farnesyltranstransferase
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Genes, ras
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Humans
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Imidazoles / chemical synthesis*
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Imidazoles / chemistry
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Imidazoles / pharmacokinetics
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Imidazoles / pharmacology
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Mice
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Mice, Inbred BALB C
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Rats
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Stereoisomerism
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Structure-Activity Relationship
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Xenograft Model Antitumor Assays
Substances
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Antineoplastic Agents
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Enzyme Inhibitors
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Imidazoles
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Benzodiazepines
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Alkyl and Aryl Transferases
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Farnesyltranstransferase
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7-cyano-2,3,4,5-tetrahydro-1-(1H-imidazol-4-ylmethyl)-3-(phenylmethyl)-4-(2-thienylsulfonyl)-1H-1,4-benzodiazepine