Benzylic C(sp<sup>3</sup>)H Perfluoroalkylation of Six-Membered Heteroaromatic Compounds
作者:Yoichiro Kuninobu、Masahiro Nagase、Motomu Kanai
DOI:10.1002/anie.201505335
日期:2015.8.24
Successful benzylic C(sp3)H trifluoromethylation, pentafluoroethylation, and heptafluoropropylation of six‐membered heteroaromatic compounds were achieved as the first examples of a practical benzylic C(sp3)H perfluoroalkylation. In these reactions, BF2CnF2n+1 (n=1–3) functioned as both a Lewis acid to activate the benzylic position and a CnF2n+1 (n=1–3) source. The perfluoroalkylation proceeded at
成功苄C(SP 3) ħ三氟甲基化,pentafluoroethylation,和的六元杂芳族化合物heptafluoropropylation分别实现为实用的第一实例苄基C(SP 3) ħ全氟烷基化。在这些反应中,BF 2 C n F 2 n +1(n = 1–3)既充当路易斯酸以激活苄基位置,又充当C n F 2 n +1(n= 1–3)源。全氟烷基化在烷基链的末端和内部进行。全氟烷基化产物以中等至优异的产率获得,即使以克为单位,也可以不分离中间体而按顺序进行。通过使用该方法,生物活性化合物的三氟甲基化以及将CF 3基引入生物活性分子骨架中在区域上进行。