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 using anhydrous 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 fluorinations using alkali metal fluorides, which generally require temperatures of ≥100 °C
本文介绍了使用无水NBu 4 F氟化氮杂环的方法。喹啉衍生物以及许多3-和5-取代的吡啶在室温下使用该试剂进行高产率的氟化。与无水NBu 4 F相比,这些结果优于使用碱金属氟化物的传统哈利克斯氟化法,后者通常需要≥100°C的温度。