Orally bioavailable STING antagonist synthesized via multi-component Povarov–Doebner type reaction.

Aberrant activation of the cGAS-STING signaling results in innate immune response induction. Herein, we report HSKB142, an orally bioavailable compound containing the 3H-pyrazolo [4,3-f]quinoline synthesized via a Povarov–Doebner MCR. HSKB142 is non-cytotoxic towards immune cells and suppresses type-1 interferon expression in human THP-1 monocytes upon treatment with 2′3′-cGAMP. [ABSTRACT FROM AUTHOR]