4-Position-Selective C–H Perfluoroalkylation and Perfluoroarylation of Six-Membered Heteroaromatic Compounds
作者:Masahiro Nagase、Yoichiro Kuninobu、Motomu Kanai
DOI:10.1021/jacs.6b01753
日期:2016.5.18
The first 4-position-selective C-H perfluoroalkylation and perfluoroarylation of six-membered heteroaromatic compounds were achieved using nucleophilic perfluoroalkylation and perfluoroarylation reagents. The regioselectivity was controlled by electrophilically activating the heteroaromatic rings, while sterically hindering the 2-position, with a sterically bulky borane Lewis acid. The reaction proceeded
使用亲核全氟烷基化和全氟芳基化试剂实现了六元杂芳族化合物的第一个 4 位选择性 CH 全氟烷基化和全氟芳基化。区域选择性是通过亲电激活杂芳环来控制的,同时空间阻碍了 2 位,使用空间上庞大的硼烷路易斯酸。反应以良好的收率进行,甚至以克规模进行,并且通过不分离中间体的顺序反应进行。该反应可应用于生物活性化合物的后期三氟甲基化。