4.5 Article

Discovery of Novel 2-Carbamoyl Morpholine Derivatives as Highly Potent and Orally Active Direct Renin Inhibitors

Journal

ACS MEDICINAL CHEMISTRY LETTERS
Volume 13, Issue 8, Pages 1351-1357

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acsmedchemlett.2c00280

Keywords

Renin inhibitor; renin-angiotensin-aldosterone system; SPH3127; binding efficiency index

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The renin-angiotensin-aldosterone system (RAAS) is crucial in blood pressure regulation, with renin being the initial and rate-limiting enzyme. A novel class of direct renin inhibitors (DRIs) composed of a 2-carbamoyl morpholine scaffold showed potent antihypertensive efficacy via oral administration in double transgenic mice.
The renin-angiotensin-aldosterone system (RAAS) plays a key role in the regulation of blood pressure. Renin, the first and rate-limiting enzyme of the RAAS, is an attractive target for the treatment of hypertension and cardiovascular/renal diseases. Therefore, various direct renin inhibitors (DRIs) have been researched over recent decades; however, most exhibited poor pharmacokinetics and oral bioavailability due to the peptidomimetic or nonpeptidomimetic structures with a molecular weight (MW) of > 600, and only aliskiren is approved. This study introduces a novel class of DRIs comprised of a 2-carbamoyl morpholine scaffold. These com-pounds have a nonpeptidomimetic structure and a MW of < 500. The representative compound 26 was highly potent despite not occupying S1 & PRIME;-S2 & PRIME; sites or the opened flap region used by other DRIs and exerted a significant antihypertensive efficacy via oral administration on double transgenic mice carrying both the human angiotensinogen and the human renin genes.

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