TY - JOUR A1 - Tanaka, Kenta A1 - Tanaka, Yuta A1 - Kishimoto, Mami A1 - Hoshino, Yujiro A1 - Honda, Kiyoshi T1 - Friedel–Crafts approach to the one-pot synthesis of methoxy-substituted thioxanthylium salts JF - Beilstein Journal of Organic Chemistry PY - 2019/// VL - 15 SP - 2105 EP - 2112 SN - 1860-5397 DO - 10.3762/bjoc.15.208 PB - Beilstein-Institut JA - Beilstein J. Org. Chem. UR - https://doi.org/10.3762/bjoc.15.208 KW - Friedel–Crafts reaction KW - metal-free conditions KW - one-pot synthesis KW - photoredox catalyst KW - thioxanthylium salt N2 - An efficient synthesis of methoxy-substituted thioxanthylium salts has been developed. The reaction of diaryl sulfides with benzoyl chlorides in the presence of TfOH smoothly proceeded to give the desired thioxanthylium salts in good yields. In their UV–vis spectra, the maximum absorption wavelengths of methoxy-functionalized thioxanthylium salts were observed at around 460 nm, which show a drastic red shift compared to the parent thioxanthylium salts. The present reaction provides a versatile access to functionalized thioxanthylium salts, and therefore it constitutes a promising tool for the synthesis of biologically and photochemically active molecules. ER -