Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors for cancer treatment. Its strained bicyclobutane structure enables unique reactivity useful in forming carbon-carbon and carbon-heteroatom bonds during drug synthesis. Commonly employed in medicinal chemistry for structure-activity relationship (SAR) studies due to its ability to modulate metabolic stability and binding affinity. Also applied in the preparation of sulfone-containing bioactive molecules where enhanced lipophilicity and electron-withdrawing properties are required.