Abstract
The trifluoromethylthio (SCF3) and trifluoromethylselanyl (SeCF3) groups possess high electron-withdrawing ability, excellent lipophilicity, good
stability, and bioavailability, and they are promising structural motifs in drug design
and development. Photoredox catalysis has clear benefits; it is a mild and sustainable
methodology for the modification of chemical structures that enables a variety of
chemical reactions that are unattainable using classical ionic chemistry. This review
focuses on light-initiated trifluoromethylthiolation and trifluoromethylselenolation
reactions with diverse SCF3 and SeCF3 reagents. Representative transformations either using photocatalysts or through EDA
complexes, as well as possible reaction mechanisms, are all discussed in this article.
1 Introduction
2 Photocatalyzed Trifluoromethylthiolation
2.1 Photocatalyzed Trifluoromethylthiolation with MSCF3 (M = H, [Me4N], Ag)
2.2 Photocatalyzed Trifluoromethylthiolation with XSCF3 (X = Cl, CF3S)
2.3 Photocatalyzed Trifluoromethylthiolation with ArSO2SCF3
2.4 Photocatalyzed Trifluoromethylthiolation with N–SCF3 Reagents
2.5 Photocatalyzed Trifluoromethylthiolation with Other Reagents
3 Photocatalyzed Trifluoromethylselenolation
3.1 Photocatalyzed Trifluoromethylselenolation with [Me4N][SeCF3]
3.2 Photocatalyzed Trifluoromethylselenolation with ArSO2SeCF3
4 Summary
Key words
trifluoromethylthiolation - trifluoromethylselenolation - visible-light irradiation
- photoredox catalysis - radical - photocatalysis