Inhibitors of cholesterol biosynthesis. 1. trans-6-(2-Pyrrol-1-ylethyl)-4-hydroxypyran-2-ones, a novel series of HMG-CoA reductase inhibitors. 1. Effects of structural modifications at the 2- and 5-positions of the pyrrole nucleus
| Autor: | Michael William Wilson, Milton L. Hoefle, D. R. Sliskovic, Roger S. Newton, Bruce D. Roth, Charlotte D. Stratton, Daniel F. Ortwine |
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| Rok vydání: | 1990 |
| Předmět: |
Chemical Phenomena
Molecular model Stereochemistry Molecular Conformation Reductase Ring (chemistry) Lactones Structure-Activity Relationship chemistry.chemical_compound Drug Discovery Animals Structure–activity relationship Pyrroles Lovastatin Ene reaction Pyrans Pyrrole chemistry.chemical_classification Molecular Structure Chemistry Physical Rats Chemistry Cholesterol Liver chemistry Molecular Medicine Hydroxymethylglutaryl-CoA Reductase Inhibitors Pharmacophore Lactone |
| Zdroj: | Journal of Medicinal Chemistry. 33:21-31 |
| ISSN: | 1520-4804 0022-2623 |
| Popis: | A novel series of trans-6-(2-pyrrol-1-ylethyl)-4-hydroxypyran-2-ones and their dihydroxy acid derivatives were prepared and evaluated for their ability to inhibit the enzyme HMG-CoA reductase in vitro. A systematic study of substitution at the 2- and 5-positions of the pyrrole ring revealed that optimum potency was realized with the 2-(4-fluorophenyl)-5-isopropyl derivative 8x, which possessed 30% of the in vitro activity of the potent fungal metabolite compactin (I). A molecular modeling analysis led to the description of a pharmacophore model characterized by (A) length limits of 5.9 and 3.3 A for the 2- and 5-substituents, respectively, as well as an overall width limit of 10.6 A across the pyrrole ring from the 2- to the 5-substituent and (B) an orientation of the ethyl(ene) bridge to the 4-hydroxypyran-2-one ring nearly perpendicular to the planes of the parent pyrrole, hexahydronaphthalene, and phenyl rings of the structures examined (Figure 3, theta = 80-110 degrees). Attempts to more closely mimic compactin's polar isobutyric ester side chain with the synthesis of 2-phenylpyrroles containing polar phenyl substituents resulted in analogues with equal or slightly reduced potencies when compared to the 2-[(unsubstituted or 4-fluoro)phenyl]pyrroles, supporting the hypothesis that inhibitory potency is relatively insensitive to side-chain polarity or charge distribution in this area. |
| Databáze: | OpenAIRE |
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