Abstract
A series of 3-arylpropionylpiperazines were synthesized as antagonists of the melanocortin-4 receptor. Their potency was found to be increased by replacing the alpha-methyl substituent of the initial lead 11 with a larger s-Bu or i-Bu group. Further potency enhancement was observed when a glycine or beta-alanine was incorporated onto the benzylamine. Some compounds demonstrated good potency, moderate selectivity, and oral bioavailability.
MeSH terms
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Animals
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Benzylamines / chemistry
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Humans
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Mice
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Molecular Structure
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Piperazine
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Piperazines / chemical synthesis
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Piperazines / chemistry*
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Piperazines / pharmacokinetics
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Piperazines / pharmacology*
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Receptor, Melanocortin, Type 4 / antagonists & inhibitors*
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Receptor, Melanocortin, Type 4 / metabolism
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Structure-Activity Relationship
Substances
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Benzylamines
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MC4R protein, human
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Piperazines
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Receptor, Melanocortin, Type 4
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Piperazine
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benzylamine