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  • Title: Benzoxazin-4-ones as novel, easily accessible inhibitors for rhomboid proteases.
    Author: Yang J, Barniol-Xicota M, Nguyen MTN, Ticha A, Strisovsky K, Verhelst SHL.
    Journal: Bioorg Med Chem Lett; 2018 May 01; 28(8):1423-1427. PubMed ID: 29506958.
    Abstract:
    Rhomboid proteases form one of the most widespread intramembrane protease families. They have been implicated in variety of human diseases. The currently reported rhomboid inhibitors display some selectivity, but their construction involves multistep synthesis protocols. Here, we report benzoxazin-4-ones as novel inhibitors of rhomboid proteases with a covalent, but slow reversible inhibition mechanism. Benzoxazin-4-ones can be synthesized from anthranilic acid derivatives in a one-step synthesis, making them easily accessible. We demonstrate that an alkoxy substituent at the 2-position is crucial for potency and results in low micromolar inhibitors of rhomboid proteases. Hence, we expect that these compounds will allow rapid synthesis and optimization of inhibitors of rhomboids from different organisms.
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