Development of novel synthetic method and its use for synthesis of natural products

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Cross-coupling reaction of indolylborate was used for concise total synththesis of calothrixins A and B. Unprecedented use of CuOTf for 6π-electrocyclization was also found, which was successfully applied for the improved synthesis of ellipticine. Introduction of aryl substituents to bicyclic lactam ABH was performed by metal-catalyzed coupling process.