A synthetic approach for the selective preparation of tri-, di-, and monosulfonated triarylphosphanes is presented. PPh n Ar 3−n parent phosphanes (1a−8a) having aryl rings (Ar) activated by simple electron donating groups (CH 3 , CH 3 O) were prepared by the standard Grignard method. The activated rings could be sulfonated selectively under mild conditions and with short reaction times (0.8−3 h). Using a very
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