Synthesis and Optimization of Small Molecule Inhibitors of Prostate Specific Antigen

Semen liquefaction is a postejaculation process that transforms semen from a gel-like (coagulated) form to a water-like consistency (liquefied). This process is primarily regulated by serine proteases from the prostate gland, most prominently, prostate-specific antigen (PSA; KLK3). Inhibiting PSA activity has the potential to impede liquefaction of human semen, presenting a promising target for nonhormonal contraception in the female reproductive tract. This study employed triazole B1 as a starting compound. Through systematic design, synthesis, and optimization, we identified compound