In recent years monofluorinated organic compounds have become interesting both from the synthetic'and biological2 points of view. However, general methods for the mild and selective introduction of a single fluorine substituent into organic molecules are limited. 3 Usually special reagents, special equipment, and/or drastic conditions are req~ ired.~ Around 1980 a new reagent, triethylamine trishydrofluoride (Et3N-3HF), 5 became ...
