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Total synthesis of 3,3′,4-tri-O-methylellagic acid from gallic acid
Alam, Ashraful,Tsuboi, Sadao
, p. 10454 - 10465 (2008/02/12)
Total synthesis of 3,3′,4-tri-O-methylellagic acid has been described from commercially available gallic acid. Construction of the crucial unsymmetric Ar-Ar bond has been carried out in various methods such as Heck coupling, Heck coupling followed by oxidation or anionic Fries rearrangement, Suzuki cross-coupling, etc., but all the attempts were unsuccessful. Then, finally it has been achieved by intramolecular Ullmann coupling reaction.
