Piperidine-renin inhibitors compounds with improved physicochemical properties.

Area of Science:

• Medicinal Chemistry
• Pharmacology
• Cardiovascular Research

Background:

• Piperidine renin inhibitors are investigated for hypertension treatment.
• Modifications to heterocyclic cores and hydrophilic attachments can enhance drug properties.
• Optimizing lipophilicity and solubility is crucial for effective drug delivery.

Purpose of the Study:

• To develop novel piperidine renin inhibitors with improved physicochemical characteristics.
• To evaluate the antihypertensive efficacy of a novel tetrahydroquinoline derivative.

Main Methods:

• Synthesis of piperidine derivatives with heterocyclic core modifications and hydrophilic attachments.
• Characterization of physical properties including lipophilicity and solubility.
• Pharmacological evaluation of a lead compound (rac-30) in sodium-depleted conscious marmosets.

Main Results:

• Piperidine renin inhibitors with modified structures exhibited reduced lipophilicity and enhanced solubility.
• Tetrahydroquinoline derivative rac-30 (MW 517, log D(pH 7.4) 1.9) showed significant blood pressure lowering effects.
• The antihypertensive effect of rac-30 was potent and long-lasting following oral administration.

Conclusions:

• Heterocyclic core modifications and hydrophilic attachments are effective strategies for improving piperidine renin inhibitor properties.
• Tetrahydroquinoline derivative rac-30 represents a promising candidate for further development as an antihypertensive agent.
• The study highlights the potential of these inhibitors in managing blood pressure through renin inhibition.