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The synthesis of 1‐benzoxepines from 2‐aroylmethoxyarylboronic acids and alkynes in the presence of a catalytic amount of [Pd(dppp)(H2O)2]2+(TfO−)2 was developed. This [5+2] annulation involves the intramolecular nucleophilic addition of a vinylpalladium species to ketones.
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Liu et al. (2007) studied this question.
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