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To examine the assembly methodology of diarylmethanes, a benzylation of (hetero)arenes with benzyl halides has been developed and various diarylmethanes were furnished with yields of up to 98% and regioselectivities of up to >99%. The complexation of the by-product halogen hydride with BF 3 ·OEt 2 generated the Bronsted acid BF 3 ·HX (HBF 3 X, X=Cl or Br) in situ...
Under open-flask conditions, an efficient method to assemble a series of diversely functionalized diarylketones in the presence of commercially available NBS has been developed. Yields of up to 99% have been achieved employing diarylmethanes as starting material. Based on 18 O-labeled experiment, the addition of stoichiometric water eventually leads to excellent yields in all carbonylation...
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