Syntheses of daidzein-7-yl β-d-glucopyranosiduronic acid and daidzein-4′,7-yl di-β-d-glucopyranosiduronic acid

Syntheses of the title compounds — commonly known as ‘daidzein 7-glucuronide’ and ‘daidzein 4′,7-diglucuronide’ — are described. Selective 7-deacetylation of 4′,7-di-O-acetyldaidzein is employed.