We summarize the different solvents tested in Table . No solvent was anhydrous nor we performed any drying procedure prior to the use. Surprisingly, the reaction was successful in hexane and Et2O (Entry 6 and 7) even if the TBAF was not completely soluble in them. Entry 12 refers to the reaction performed in a mortar using solid TBAF trihydrate. The mixture was found very hygroscopic and no product was obtained. A detrimental role of water or other proton source is clear, even when a large excess of TBAF is used (Entry 11-14). The reaction in DMSO (Entry 8) yielded a very complex mixture; no reaction was observed in CHCl3 (Entry 9), most likely as a result of the incompatibility of TBAF and halogenated solvents. It is worth mentioning that the reaction performed as Entry 1 on a 2g scale produced benzophenone with a quantitative yield and 98% purity by HPLC-MS.