Scheme 5. Hydroarylation of the monocyclisation intermediates. Reaction conditions: (a) 9F (5 equiv.), BrettPhosAu(MeCN)SbF6 (5 mol%), DCE, 60 °C, and 1.5 h. (b) BrettPhosAu(MeCN)SbF6 (5 mol%), TCE, 110 °C, and 0.5 h.
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