Mild Fluorination of Chloropyridines with in Situ Generated Anhydrous Tetrabutylammonium Fluoride
作者:Laura J. Allen、Joseck M. Muhuhi、Douglas C. Bland、Rachel Merzel、Melanie S. Sanford
DOI:10.1021/jo5003054
日期:2014.6.20
This paper describes the fluorination of nitrogen heterocycles usinganhydrous NBu4F. Quinoline derivatives as well as a number of 3- and 5-substituted pyridines undergo high-yielding fluorination at room temperature using this reagent. These results with anhydrous NBu4F compare favorably to traditional halex fluorinationsusing alkali metal fluorides, which generally require temperatures of ≥100 °C