Table 3.

Hydrofluorination of alkynes with various heterocyclic substituents.^a

^aReaction conditions: 1 (0.2 mmol), 1 equiv KHSO₄-13HF, 2 equiv DMPU-12HF, neat, 50 °C, 3 h. All yields are for isolated products.

^b15 h reaction time.