Studies of the Selective O-Alkylation and Dealkylation of Flavonoids. V. The Synthesis of 5,6-Dihydroxy-3,4',8-trimethoxyflavone and a Revised Structure for the Flavone from Conyza stricta

Article abstract of DOI:10.1246/bcsj.55.2933

5,6-Dihydroxy-3,4',8-trimethoxyflavone, which was the proposed structure of the pigment occuring in Conyza stricta, was synthesized from 2,3,5,6-tetramethoxyacetophenone in six steps.The natural pigment was identical not with the synthesized flavone, but