Efficient Synthesis of Acyclic and Cyclic Pyrazoles for Evaluation as Antiviral nsp2 Protease Inhibitors

Pyrazole (E)-vinyl sulfone 3 was identified as a potential covalent CHIKV nsp2 protease inhibitor from a high throughput screen in the READDI Antiviral Drug Discovery Center at UNC.1 Initial re-synthesis of the hit compound yielded a mixture of acyclic (3) and cyclic sulfones (4) (Scheme 1), which were identified by 1D and 2D NMR, but Read More …