Direct fluorination of primary and secondary alcohols by a combination of perfluoro-1-butanesulfonyl fluoride (PBSF) and tetrabutylammonium triphenyldifluorosilicate (TBAT) under mild conditions provides the corresponding fluorides in high yields. With this combination, elimination side reactions could be significantly suppressed and chiral secondary alcohols were less prone to epimerization at the reaction center.
在温和的条件下,
全氟-1-丁磺酰
氟(PBSF)和四丁基三苯基
氟硅酸铵(TBAT)组合对伯醇和仲醇进行直接
氟化反应,可获得高产率的相应
氟化物。在这种组合下,消除副反应的效果明显减弱,手性仲醇在反应中心也不易发生缩合反应。