作者:Amit K. Jaiswal、Pragati K. Prasad、Rowan D. Young
DOI:10.1002/chem.201806272
日期:2019.5.2
silylated pseudohalides TMS‐OMs or TMS‐NTf2, resulting in the formation of TMS‐F and a trapped aliphatic pseudohalide intermediate. The rate of fluoride/pseudohalide exchange and the stability of this intermediate are such that little rearrangement is observed for terminal fluoride positions in linear aliphatic fluorides. The ability to convert organofluoride positions into pseudohalide groups allows
已经报道了用多种亲核试剂将脂肪族氟化物官能化的方法。通过使用甲硅烷基化的假卤化物TMS-OMs或TMS-NTf 2热力学驱动碳-氟键裂解,导致形成TMS-F和捕获的脂族假卤化物中间体。氟化物/假卤化物的交换速率和该中间体的稳定性使得在直链脂肪族氟化物中几乎看不到末端氟化物的重排。将有机氟化物位置转化为假卤化物基团的能力允许各种亲核试剂容易地进行亲核攻击。亲核试剂的后期引入还允许偶联伴侣具有广泛的功能基团耐受性。在存在其他烷基卤化物的情况下观察到选择性的烷基氟化物甲磺酰化,从而允许正交合成策略。