ChemInform Abstract: Easy and Efficient Heterogeneous Nucleophilic Fluorination without Solvent.

Alkyl halides and tosylates such as the bromides (Ia)‐(Id) are treated with cesium fluoride and an ammonium phase‐transfer catalyst or directly with tetrabutylammonium fluoride in the absence of solvents, producing satisfactory yields of the corresponding alkyl fluorides such as (IIa)‐(IId).