P. Lewis et al., THE PHASE-TRANSFER-CATALYZED SYNTHESIS OF ISOFLAVONE-O-GLUCOSIDES, Journal of the Chemical Society. Perkin transactions. I (Print), (16), 1998, pp. 2481-2484
Daidzin 1, genistin 2, ononin 3 and sissotrin 4 are the major products
of the phase transfer catalysed reaction between the isoflavone aglyc
ones daidzein, genistein, formononetin and biochanin A, respectively,
and -bromo-2,3,4,6-tetra-O-acetyl-alpha-glucopyranose. Complete proton
and carbon NMR assignments are presented for compounds 1-4.