Friedel-Crafts Reaction of Benzyl Fluorides: Selective Activation of CF Bonds as Enabled by Hydrogen Bonding
作者:Pier Alexandre Champagne、Yasmine Benhassine、Justine Desroches、Jean-François Paquin
DOI:10.1002/anie.201406088
日期:2014.12.8
Friedel–Crafts benzylation of arenes with benzyl fluorides has been developed. The reaction produces 1,1‐diaryl alkanes in good yield under mild conditions without the need for a transition metal or a strong Lewis acid. A mechanism involving activation of the CF bond through hydrogen bonding is proposed. This mode of activation enables the selective reaction of benzylic CF bonds in the presence of other benzylic
已经开发了用苄基氟化物进行芳烃的弗里德尔-克拉夫茨苄基化反应。在温和的条件下,该反应可高收率地生成1,1-二芳基烷烃,而无需过渡金属或强路易斯酸。提出了一种通过氢键激活CF键的机理。这种活化方式能够在存在其他苄基离去基团的情况下使苄基CF键选择性反应。