A palladium-catalyzed tandem C-H activation/biscyclization reaction of propargylic carbonates with terminal alkynes was determined, which allowed the tetracyclic benz[a]anthracene framework to be constructed with high regioselectivity. A possible mechanism for this tandem C-H activation/biscyclization process was discussed.
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Ren et al. (2009) studied this question.
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