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Synthesis of arrecatannin A1 (1) was accomplished from dimeric epicatechin electrophile, which was prepared by Zn(OTf) 2  mediated self-condensation, and monomeric catechin nucleophile. The condensation was successfully worked using Yb(OTf) 3  as a Lewis acid in good yield.

Synthesis of Arecatannin A1 from Dimeric Epicatechin Electrophile