Faster initiation in the Friedel-Crafts reaction of benzyl fluorides using trifluoroacetic acid as activator
作者:Rémy Hemelaere、Pier Alexandre Champagne、Justine Desroches、Jean-François Paquin
DOI:10.1016/j.jfluchem.2016.08.003
日期:2016.10
acid (TFA) shortens the induction period associated with the 1,1,1,3,3,3-hexafluoroisopropoanol (HFIP)-promoted Friedel-Crafts reaction of benzylic fluorides. This faster initiation is due to TFA’s strong hydrogen-bond donation capability, not its Brønsted acidity. The improved reaction conditions were applied to a set of substrates, demonstrating how they could improve yields and reliability of this
我们报告说,催化量的三氟乙酸(TFA)的添加缩短了与1,1,1,3,3,3-六氟异丙醇(HFIP)促进的苄基氟化物的Friedel-Crafts反应相关的诱导期。更快的引发是由于TFA强大的氢键捐赠能力,而不是其Brønsted酸度。改进的反应条件应用于一组底物,证明了它们如何提高这种转化的收率和可靠性。