Facile preparation of 3-substituted-2,6-difluoropyridines: application to the synthesis of 2,3,6-trisubstituted pyridines
作者:Taisuke Katoh、Yoshihide Tomata、Tetsuya Tsukamoto、Yoshihisa Nakada
DOI:10.1016/j.tetlet.2015.09.057
日期:2015.10
We report a facile method for the difluorination of 3-substituted-2,6-dichloropyridines using cesium fluoride as a fluorination reagent in dimethyl sulfoxide. It is proposed that this method for preparing 3-substituted-2,6-difluoropyridines is simpler and easier than those reported in previous literature. To examine the utility of 3-substituted-2,6-difluoropyridines in synthetic chemistry, we also
我们报告了一种简便的方法,使用氟化铯作为二甲基亚砜中的氟化试剂,对3-取代的2,6-二氯吡啶进行二氟化。提出这种制备3-取代的2,6-二氟吡啶的方法比以前文献中报道的方法更简单,更容易。为了检查3-取代的2,6-二氟吡啶在合成化学中的效用,我们还证明了随后通过串联亲核性芳族取代转化为2,3,6-三取代的吡啶。