Abstract: Bruton’s tyrosine kinase (BTK), a cytoplasmic tyrosine kinase, plays a central role in the activation of B cells and granulocytes, operating downstream of B cell and Fcγ receptors, and is considered an attractive target for treating autoimmune diseases. Preclinical investigations have demonstrated that inhibition of BTK activity holds promise as a potential therapeutic strategy for inflammatory immune responses such as autoimmune diseases and allergies. This review provides an overview of the mechanisms by which BTK contributes to immune-related diseases and summarizes current research on the development of BTK inhibitors for treating these conditions, aiming to offer novel insights into non-oncology applications for BTK inhibitors.

Abstract: In the present study, the compound XL-12 from our previous work was utilized as a lead compound. Through the optimization of the terminal phenyl ring, 12 target compounds were designed and synthesized. The structures of all target compounds were confirmed by 1H NMR, 13C NMR, and H RMS. In vitro enzyme activity assay showed that most compounds demonstrated significant inhibitory activity toward Bruton’s tyrosine kinase (BTK) and Janus kinase 3 (JAK3). Among them, compound I-3 exhibited moderate cell proliferation inhibitory activity toward Daudi cells and BaF3-JAK3 cells. In the evaluation of anti-inflammatory activity in vitro, compound I-3 could effectively inhibit the production of inflammatory factors IL-6; besides, it exhibited superior anti-inflammatory activity compared to ibrutinib in xylene-induced ear swelling model in mice.