Abstract
(N-1',1'-Dimethylethyl)-3-haloandrost-3,5-diene-17 beta-carboxamides (9-11) and the methyl ester 8 were prepared from 3-chloro/bromoandrost-3,5-diene-17 beta-carboxylic chloride/bromide (6/7), which were obtained from pregnenolone. In comparison with finasteride and 4-MA, compounds 8-11 showed very weak inhibitory activity ( < or = 10% inhibition) on human type I 5 alpha-reductase (transfected 293 cells) at 100 and 1000 nM concentrations. Against the type II enzyme, chloro compounds 8 and 9, and bromo 10 had no effect at 100 nM concentration, however, they were weak inhibitors of the type II (6.0% < inhibition < 30%) at a higher concentration. The best activity (IC50 = 480 nM) was observed with the 3-vinyl fluoride analogue 11.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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3-Oxo-5-alpha-Steroid 4-Dehydrogenase / genetics
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3-Oxo-5-alpha-Steroid 4-Dehydrogenase / metabolism*
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5-alpha Reductase Inhibitors*
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Androstadienes / chemical synthesis
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Androstadienes / chemistry*
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Androstadienes / pharmacology*
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Androstenes / chemistry
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Cells, Cultured
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Dose-Response Relationship, Drug
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Enzyme Inhibitors / chemical synthesis
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Enzyme Inhibitors / chemistry*
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Enzyme Inhibitors / pharmacology*
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Finasteride
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Halogens / chemistry
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Humans
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Isoenzymes
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Structure-Activity Relationship
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Transfection
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Vinyl Compounds / chemical synthesis
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Vinyl Compounds / chemistry*
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Vinyl Compounds / pharmacology*
Substances
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5-alpha Reductase Inhibitors
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Androstadienes
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Androstenes
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Enzyme Inhibitors
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Halogens
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Isoenzymes
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N-(1',1'-dimethylethyl)-3-fluoroandrost-3,5-dien-17-carboxamide
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Vinyl Compounds
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vinyl fluoride
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Finasteride
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3-Oxo-5-alpha-Steroid 4-Dehydrogenase