>>> Properties & Applications <<<

Thietane dioxide is an oxidized sulfur-containing four-membered ring that can serve as a bioisosteric replacement for common structural motifs in medicinal chemistry.

Compared with cyclobutane, thietane in its S(II) state exhibits similar lipophilicity, whereas oxidation to S(IV) and S(VI) generally leads to lower lipophilicity, stronger acidity or weaker basicity, and increased polarity. These differences offer opportunities to modulate the physicochemical properties of pharmaceutical molecules.

Oxidized thietane motifs have been explored in various bioactive compounds.
For example, thietane-scaffold-containing active molecules were screened in:
🔹WO2009080250🔹 insecticide patents from Syngenta
🔹WO2025096660🔹 POLRMT inhibitor patents from Pretzel Therapeutics

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