composite solid reagent consisting of lead(II) fluoride and a small amount of sodium bromide has been found to facilitate the fluorination of allylic halides in acetonitrile to afford a mixture of the corresponding and rearranged fluorides in the ratio of 1:1 to 1:2. Such allylic rearrangement is not observed when KF/18-crown-6 or tetrabutylammonium fluoride are employed.
已发现由
氟化
铅(II)和少量
溴化钠组成的复合固体试剂有助于在
乙腈中
氟化烯丙基卤化物,从而以1:1至1:1的比例提供相应的和重排的
氟化物的混合物。 2。当使用KF / 18-crown-6或
氟化四丁基
铵时,未观察到这种烯丙基重排。