Tetrahedron p. 6885 - 6894 (1990)
Update date:2022-07-29
Topics:
Mouton, C. Hendrik L.
Steenkamp, Jacobus A.
Young, Desmond A.
Bezuidenhoudt, Barend C. B.
Ferreira, Daneel
The phenolic methyl ethers of flavan-3-ols, 4-arylflavan-3-ols, and (-)-fisetinidol-(4,8)-(+)-catechin biflavanoids are susceptible to regio- and stereoselective hydroxylation at C-4 in moderate to high yields with potassium persulphate/cupric sulphate in aqueous acetonitrile.The resultant 4-functionalized analogues are of both synthetic and degradative significance in condensed tannin chemistry.
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