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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...
An effective approach for the direct benzylhalogenation with in situ generation of hypervalent halides has been developed. A variety of benzyl halides are produced in moderate to excellent yields (up to 99%) with high regioselectivities. UV absorption spectrum is employed to detect the formation of tert-butyl hypoiodite.
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