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ACS Med Chem Lett. 2013 Jun 6;4(8):773-8. doi: 10.1021/ml400168h. eCollection 2013 Aug 8.

Potent DGAT1 Inhibitors in the Benzimidazole Class with a Pyridyl-oxy-cyclohexanecarboxylic Acid Moiety.

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1
Discovery and Preclinical Sciences, Merck Research Laboratories , 2000 Galloping Hill Road, Kenilworth, New Jersey 07033, United States.

Abstract

We report the design and synthesis of a series of novel DGAT1 inhibitors in the benzimidazole class with a pyridyl-oxy-cyclohexanecarboxylic acid moiety. In particular, compound 11A is a potent DGAT1 inhibitor with excellent selectivity against ACAT1. Compound 11A significantly reduces triglyceride excursion in lipid tolerance tests (LTT) in both mice and dogs at low plasma exposure. An in vivo study in mice with des-fluoro analogue 10A indicates that this series of compounds appears to distribute in intestine preferentially over plasma. The propensity to target intestine over plasma could be advantageous in reducing potential side effects since lower circulating levels of drug are required for efficacy. However, in the preclinical species, compound 11A undergoes cis/trans epimerization in vivo, which could complicate further development due to the presence of an active metabolite.

KEYWORDS:

ACAT1; DGAT1; benzimidazole; cyclohexanecarboxylic acid; epimerization; inhibitor; lipid tolerance test; metabolite

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