Design and synthesis of a novel 1H-pyrrolo[3,2-b]pyridine-3-carboxamide derivative as an orally available ACC1 inhibitor

Add time:08/02/2019    Source:sciencedirect.com

We initiated our structure-activity relationship (SAR) studies for novel ACC1 inhibitors from 1a as a lead compound. Our initial SAR studies of 1H-Pyrrolo[3,2-b]pyridine-3-carboxamide scaffold revealed the participation of HBD and HBA for ACC1 inhibitory potency and identified 1-methyl-1H-pyrrolo[3,2-b]pyridine-3-carboxamide derivative 1c as a potent ACC1 inhibitor. Although compound 1c had physicochemical and pharmacokinetic (PK) issues, we investigated the 1H-pyrrolo[3,2-b]pyridine core scaffold to address these issues. Accordingly, this led us to discover a novel 1-isopropyl-1H-pyrrolo[3,2-b]pyridine-3-carboxamide derivative 1k as a promising ACC1 inhibitor, which showed potent ACC1 inhibition as well as sufficient cellular potency. Since compound 1k displayed favorable bioavailability in mouse cassette dosing PK study, we conducted in vivo Pharmacodynamics (PD) studies of this compound. Oral administration of 1k significantly reduced the concentration of malonyl-CoA in HCT-116 xenograft tumors at a dose of 100 mg/kg. Accordingly, our novel series of potent ACC1 inhibitors represent useful orally-available research tools, as well as potential therapeutic agents for cancer and fatty acid related diseases.

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