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KMID : 0370220130570050357
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Yakhak Hoeji
2013 Volume.57 No. 5 p.357 ~ p.361
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Formal Synthesis of Lespedezol A1 via Versatile Palladium-Catalyzed Cross-Coupling of Diazochromanone with Arylboronic Acid
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Han Young-Taek
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Abstract
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A formal synthesis of Lespedezol A1 has been accomplished. The key feature of this synthesis involves an efficient and powerful palladium-catalyzed cross coupling reaction of diazocarbonyl compound with bis(benzyloxy)phenylboronic acid for the key 3-aryl-chromen-4-one intermediate, which was difficult to be prepared by Suzuki coupling reaction in the previous study. The versatile and efficient synthetic procedure would facilitate synthesis of pterocarpenes and their derivatives.
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KEYWORD
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Lespedezol A1, pterocarpene, diazocarbonyl, palladium, cross-coupling
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