NLRP3 inflammasome mediated release of interleukin-1β (IL-1β) has been implicated in various diseases. In this study, rationally designed mimics of sulfonylurea moiety were investigated as NLRP3 inhibitors. Our results culminated into discovery of series of unprecedented N-cyano sulfoximineurea derivatives as potent NLRP3 inflammasome inhibitors. Compound 15 (IC 50 = 7 nM) and analogues were found to be highly potent and selective NLRP3 inflammasome inhibitor with good pharmacokinetic profile. These effects translate in vivo, as 15, 29, and 34 significantly inhibit NLRP3 dependent IL-1β secretion in mice.

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Hexahydrocyclopentapyrrolone derivatives constitute an important class of bicycles, and it represents an essential pharmacophore for diversified pharmacological activities. A highly efficient process for the synthesis of tert-butyl(3aR,6aS)-5-oxohexahydrocyclopenta[c]pyrrole-2(1H)-carboxylate 1 has been developed. The improved process involves transformation of isoindole 4 to diacid 5, using an inexpensive KMnO 4 mediated oxidative cleavage as a key step. The developed process was cost-effective, high yielding, kilogram scalable, and commercially viable for synthesis of 1.

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