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An efficient synthetic method of benzopyran derivatives involving coumarins is disclosed. Gold-catalyzed benzopyran formation and subsequent aryne reactions enabled us to prepare a wide range of benzopyran derivatives by virtue of their good functional group tolerance and versatile transformability of aryne intermediates. The synthetic utility was showcased by a diarylnaphthopyran synthesis through this method and consecutive cross-coupling reactions.
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Nakamura et al. (2020) studied this question.
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