Trifluoromethylation of 1-Aryl-3,3-diisopropyltriazenes
作者:Andreas Hafner、Stefan Bräse
DOI:10.1002/adsc.201201040
日期:2013.3.25
new method for the trifluoromethylation of functionalized aromatic diisopropyltriazenes is described. In a facile two‐step, one‐pot synthesis, various functionalized trifluoromethyl‐substituted arenes are accessible in mostly good yields by using methyl iodide as iodination agent and the trifluoromethylation system (trifluoromethyl)trimethylsilane/potassium fluoride/copper iodide. This concept could
F for fast: The perfluorinated solvent C6F14 is the key to a new variant of the Balz–Schiemann reaction for the synthesis of fluorinated arenes. Triazenes are converted into fluoroarenes under mild conditions on a support and in solution (see scheme). The method is straightforward and inexpensive, and yields previously difficult‐to‐prepare fluoroarenes in high purity.
快速反应的F:全氟化溶剂C 6 F 14是Balz-Schiemann反应新变体(用于合成氟化芳烃)的关键。在温和的条件下,将三氮烯在载体和溶液中转化为氟代芳烃(参见方案)。该方法简便易行且价格便宜,并且可以产生以前难以制备的高纯度氟代芳烃。