• YAKHAK HOEJI
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• v.57 no.5
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• pp.357-361
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• 2013

A formal synthesis of Lespedezol $A_1$ 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.

• Bulletin of the Korean Chemical Society
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• v.14 no.6
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• pp.664-665
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• 1993