Abstract
The synthesis of naturally occurring 7,8-methylenedioxy-4′-methoxyisoflavone and 7,8-methylenedioxy-4′-methoxy-flavone from 2′-hydroxy-3′,4′-methylenedioxy-4-methoxychalcone via the intermediacy of 7,8-methylenedioxy-4′-methoxyflavanone using thallium(III) acetate and catalytic amount of perchloric acid is reported. The products flavanone and the flavone are new flavonoids characterised by spectral analysis.
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