The trifluoromethanesulfonyl (SO2CF3) group is an important fluorinated functional group with pronounced electron-withdrawing character.

Among the commonly used trifluoromethyl-derived substituents, including CF3, OCF3, SCF3, and SO2CF3, the trifluoromethanesulfonyl group exhibits the strongest electron-withdrawing ability:
▫️ σm = 0.79
▫️ σp = 0.93
The combination of a sulfonyl unit and a trifluoromethyl group gives rise to a highly electron-deficient substituent, making the trifluoromethanesulfonyl group valuable for tuning the electronic properties and reactivity of aromatic compounds.
[More info] 📰https://doi.org/10.1021/cr500193b

Trifluoromethanesulfonylbenzene derivatives have attracted considerable attention as privileged scaffolds in drug discovery. Incorporation of the trifluoromethanesulfonylbenzene motif provides a highly electron-deficient aromatic framework that can be exploited to fine-tune molecular properties and biological activity.
A representative example is the Bcl-2/Bcl-XL inhibitor Navitoclax (ABT-263, Navitoclax), an orally active anticancer agent developed through optimization of the lead compound ABT-737. The presence of a trifluoromethanesulfonylbenzene unit in Navitoclax highlights the pharmaceutical relevance of this scaffold and demonstrates its utility in the design of bioactive molecules with improved pharmacological performance.
[More info] 📰https://doi.org/10.1021/jm800669s

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