Azaindoles: Noncovalent DprE1 Inhibitors from Scaffold Morphing Efforts, Kill Mycobacterium tuberculosis and Are Efficacious in Vivo

We report 1,4-azaindoles as a new inhibitor class that kills Mycobacterium tuberculosisin vitro and demonstrates efficacy in mouse tuberculosis models. The series emerged from scaffold morphingefforts and was demonstrated to noncovalently inhibit decaprenylphosphoryl-β-d-ribose2′-epimerase (DprE1). With “drug-like” properties and no expectation of pre-existingresistance in the clinic, this chemical class has the potential to be developed as a therapy for drug-sensitive and drug-resistant tuberculosis.