Palladium-catalysed direct arylations of NH-free pyrrole and N-tosylpyrrole with aryl bromides
作者:Charles Beromeo Bheeter、Jitendra K. Bera、Henri Doucet
DOI:10.1016/j.tetlet.2011.11.081
日期:2012.2
The palladium-catalyseddirectcoupling of aryl halides with pyrroles provides a greener access to arylated pyrroles than more classical couplings such as Suzuki, Stille or Negishi reactions. However, so far, NH-free pyrrole and N-tosylpyrrole gave disappointing results for such couplings either in terms of regioselectivity of the arylation, catalyst loading or substrate scope. The reactivity of both