Berger, F.; Ritter, T. Site-Selective Late-Stage C–H Functionalization Via Thianthrenium Salts. Synlett 2022, 33, 339–345.

Juliá, F.; Shao, Q.; Duan, M.; Plutschack, M. B.; Berger, F.; Mateos, J.; Lu, C.; Xue, X.-S.; Houk, K. N.; Ritter, T. High Site Selectivity in Electrophilic Aromatic Substitutions: Mechanism of C–H Thianthrenation. Journal of the American Chemical Society 2021, 143, 16041–16054.

Alvarez, E. M.; Karl, T.; Berger, F.; Torkowski, L.; Ritter, T. Late‐Stage Heteroarylation of Hetero(Aryl)Sulfonium Salts Activated by α‐Amino Alkyl Radicals. Angewandte Chemie International Edition 2021, 60, 13609–13613.

Jia, H.; Häring, A. P.; Berger, F.; Zhang, L.; Ritter, T. Trifluoromethyl Thianthrenium Triflate: A Readily Available Trifluoromethylating Reagent with Formal CF₃⁺, CF₃^•, and CF₃^– Reactivity. Journal of the American Chemical Society 2021, 143, 7623–7628.

Berger, F.; Alvarez, E. M.; Frank, N.; Bohdan, K.; Kondratiuk, M.; Torkowski, L.; Engl, P. S.; Barletta, J.; Ritter, T. Cine-Substitutions at Five-Membered Hetarenes Enabled by Sulfonium Salts. Organic Letters 2020, 22, 5671–5674.

Alvarez, E. M.; Plutschack, M. B.; Berger, F.; Ritter, T. Site-Selective C–H Functionalization–Sulfination Sequence to Access Aryl Sulfonamides. Organic Letters 2020, 22, 4593–4596.

Chen, J.; Li, J.; Plutschack, M. B.; Berger, F.; Ritter, T. Regio‐ and Stereoselective Thianthrenation of Olefins To Access Versatile Alkenyl Electrophiles. Angewandte Chemie, International Edition 2020, 59, 5616–5620.

Xu, P.; Zhao, D.; Berger, F.; Hamad, A.; Rickmeier, J.; Petzold, R.; Kondratiuk, M.; Bohdan, K.; Ritter, T. Site‐Selective Late‐Stage Aromatic [¹⁸F]Fluorination Via Aryl Sulfonium Salts. Angewandte Chemie, International Edition 2020, 59, 1956–1960.

Li, J.; Chen, J.; Sang, R.; Ham, W.-S.; Plutschack, M. B.; Berger, F.; Chabbra, S.; Schnegg, A.; Genicot, C.; Ritter, T. Photoredox Catalysis with Aryl Sulfonium Salts Enables Site-Selective Late-Stage Fluorination. Nature Chemistry 2020, 12, 56–62.

Sang, R.; Korkis, S. E.; Su, W.; Ye, F.; Engl, P. S.; Berger, F.; Ritter, T. Site‐Selective C−H Oxygenation Via Aryl Sulfonium Salts. Angewandte Chemie, International Edition 2019, 58, 16161–16166.

Ye, F.; Berger, F.; Jia, H.; Ford, J.; Wortman, A.; Börgel, J.; Genicot, C.; Ritter, T. Aryl Sulfonium Salts for Site‐Selective Late‐Stage Trifluoromethylation. Angewandte Chemie, International Edition 2019, 58, 14615–14619.

Engl, P. S.; Häring, A. P.; Berger, F.; Berger, G.; Pérez-Bitrián, A.; Ritter, T. C–N Cross-Couplings for Site-Selective Late-Stage Diversification Via Aryl Sulfonium Salts. Journal of the American Chemical Society 2019, 141, 13346–13351.

Berger, F.; Plutschack, M. B.; Riegger, J.; Yu, W.; Speicher, S.; Ho, M.; Frank, N.; Ritter, T. Site-Selective and Versatile Aromatic C−H Functionalization by Thianthrenation. Nature 2019, 567, 223–228.

Börgel, J.; Tanwar, L.; Berger, F.; Ritter, T. Late-Stage Aromatic C–H Oxygenation. Journal of the American Chemical Society 2018, 140, 16026–16031.

Berger, F. Site-Selective Aromatic C-H Functionalization Yielding Triarylsulfonium Salts, and Subsequent Transformations. PhD Thesis, Rheinisch-Westfälische Technische Hochschule, Aachen, 2019.